Write 925 in expanded form. the answer is not 900 +20+5
925 in expanded form is 900 + 20 + 5 because it cannot be expressed in any other way using addition.
Write 925 in expanded form.(1 point)
925 in expanded form is written as 9*100 + 2*10 + 5*1.
What is the expanded form of 23.75?(1 point)
Responses
(2×10)+(3×1)+(5×110)+(7×1100)
left parenthesis 2 times 10 right parenthesis plus left parenthesis 3 times 1 right parenthesis plus left parenthesis 5 times Start Fraction 1 over 10 End Fraction right parenthesis plus left parenthesis 7 times Start Fraction 1 over 100 End Fraction right parenthesis
(5×10)+(7×1)+(3×110)+(2×1100)
left parenthesis 5 times 10 right parenthesis plus left parenthesis 7 times 1 right parenthesis plus left parenthesis 3 times Start Fraction 1 over 10 End Fraction right parenthesis plus left parenthesis 2 times Start Fraction 1 over 100 End Fraction right parenthesis
(2×10)+(3×1)+(7×110)+(5×1100)
left parenthesis 2 times 10 right parenthesis plus left parenthesis 3 times 1 right parenthesis plus left parenthesis 7 times Start Fraction 1 over 10 End Fraction right parenthesis plus left parenthesis 5 times Start Fraction 1 over 100 End Fraction right parenthesis
(2×10)+(3×1)+(7×1101)+(5×1102)
The correct expanded form of 23.75 is (2×10)+(3×1)+(7×1/10)+(5×1/100).
What is the expanded form of 23.75?
The expanded form of 23.75 is (2 × 10) + (3 × 1) + (7 × 1/10) + (5 × 1/100).
Write the expanded form of 357.25
The expanded form of 357.25 is (3 × 100) + (5 × 10) + (7 × 1) + (2 × 1/10) + (5 × 1/100).
What is the expanded form of 8,471.716
The expanded form of 8,471.716 is (8 × 1000) + (4 × 100) + (7 × 10) + (1 × 1) + (7 × 1/10) + (1 × 1/100) + (6 × 1/1000).
Which sentence uses a semicolon correctly?(1 point)
Responses
We moved practice to the gym; after it started raining.
We moved practice to the gym; after it started raining.
I need to bring the following things; my gym bag, my backpack, and your helmet.
I need to bring the following things; my gym bag, my backpack, and your helmet.
The stadium is located next to the school; it does not take long to walk there.
The stadium is located next to the school; it does not take long to walk there.
Before we go to softball practice; we have to finish our homework.
The sentence "The stadium is located next to the school; it does not take long to walk there." uses a semicolon correctly.
Which describes an independent clause?(1 point)
Responses
a sentence fragment
a sentence fragment
an incomplete sentence
an incomplete sentence
a phrase in a sentence without a verb
a phrase in a sentence without a verb
a part of a sentence that can stand alone
The correct response is "a part of a sentence that can stand alone." An independent clause is a group of words that contains a subject and a predicate and forms a complete sentence on its own.
Colons and Semi-Colons Quick Check
3 of 43 of 4 Items
Question
What is a compound sentence?(1 point)
Responses
a sentence with one independent clause and one dependent clause
a sentence with one independent clause and one dependent clause
a sentence with two dependent clauses and no independent clauses
a sentence with two dependent clauses and no independent clauses
a sentence with two independent clauses and no dependent clauses
a sentence with two independent clauses and no dependent clauses
a sentence with no dependent clauses
The correct response is "a sentence with two independent clauses and no dependent clauses." A compound sentence is formed by combining two independent clauses using a coordinating conjunction or a semicolon. It expresses two complete thoughts or ideas in a single sentence.
Which sets off an introductory phrase?(1 point)
Responses
a colon
a colon
a conjunction
a conjunction
a semicolon
a semicolon
a comma
The correct response is "a comma." A comma is used to set off an introductory phrase, which is a group of words that provides additional information at the beginning of a sentence. It helps to separate the introductory phrase from the main clause of the sentence.
please check my work
Which sentence uses a semicolon correctly?(1 point)
Responses
We moved practice to the gym; after it started raining.
.
I need to bring the following things; my gym bag, my backpack, and your helmet.
The stadium is located next to the school; it does not take long to walk there. i chose this
Which describes an independent clause?(1 point)
Responses
a sentence fragment
an incomplete sentence
a phrase in a sentence without a verb
a part of a sentence that can stand alone i chose this
What is a compound sentence?(1 point)
Responses
a sentence with one independent clause and one dependent clause
a sentence with two dependent clauses and no independent clauses i chose this
a sentence with two independent clauses and no dependent clauses
a sentence with no dependent clauses
Which sets off an introductory phrase?(1 point)
Responses
a colon
a conjunction
a semicolon
a comma i chose this
Great job! Your answers are correct.
1. The sentence that uses a semicolon correctly is: "The stadium is located next to the school; it does not take long to walk there."
2. The correct description of an independent clause is: "a part of a sentence that can stand alone."
3. The correct definition of a compound sentence is: "a sentence with two independent clauses and no dependent clauses."
4. The correct punctuation mark to set off an introductory phrase is a comma.
Modeling Waves Quick Check
1 of 41 of 4 Items
Question
Use the image to complete the statement.
In wave A, the wave goes a certain distance above and below the horizontal line and covers a certain distance along the horizontal line between two consecutive crests labeled lambda. In wave B, the distance above and below the horizontal line is nearly the same as in the first wave, but the distance along the horizontal line between two consecutive crests is much shorter than the first wave.
Compared to wave A, wave B has a _____.
(1 point)
Responses
longer wavelength and lower frequency
longer wavelength and lower frequency
shorter wavelength and lower frequency
shorter wavelength and lower frequency
shorter wavelength and greater frequency
shorter wavelength and greater frequency
longer wavelength and greater frequency
Compared to wave A, wave B has a shorter wavelength and greater frequency.
When drawn on a coordinate plane with the x-axis as the baseline, a wave with a crest that is closer to the baseline has a smaller _____.(1 point)
Responses
wavelength
wavelength
amplitude
amplitude
equilibrium
equilibrium
frequency
When drawn on a coordinate plane with the x-axis as the baseline, a wave with a crest that is closer to the baseline has a smaller amplitude.
Use the table to answer the question.
Wave λ
(m) vw
(m/s)
L 120 600
M 150 600
N 100 600
O 50 600
The table shows information about four waves. Which wave has the lowest frequency?
(1 point)
Responses
wave N
wave N
wave M
wave M
wave L
wave L
wave O
The wave with the lowest frequency is wave N, as it has the smallest wavelength (100 m) compared to the other waves.
A student moves the end of a compressed coiled spring up and down to demonstrate wave motion. She then moves the compressed coiled spring faster but keeps everything else the same. Which characteristic will increase?(1 point)
Responses
amplitude
amplitude
crest
crest
frequency
frequency
wavelength
wavelength
If the student moves the compressed coiled spring faster while keeping everything else the same, the characteristic that will increase is the frequency. Increasing the speed of the motion will result in the wave oscillating more times per second, thus increasing the frequency of the wave.
check my answers Use the image to complete the statement.
In wave A, the wave goes a certain distance above and below the horizontal line and covers a certain distance along the horizontal line between two consecutive crests labeled lambda. In wave B, the distance above and below the horizontal line is nearly the same as in the first wave, but the distance along the horizontal line between two consecutive crests is much shorter than the first wave.
Compared to wave A, wave B has a _____.
(1 point)
Responses
longer wavelength and lower frequency
longer wavelength and lower frequency
shorter wavelength and lower frequency
shorter wavelength and lower frequency
shorter wavelength and greater frequency i chose this
shorter wavelength and greater frequency
longer wavelength and greater frequency
longer wavelength and greater frequency
When drawn on a coordinate plane with the x-axis as the baseline, a wave with a crest that is closer to the baseline has a smaller _____.(1 point)
Responses
wavelength
wavelength
amplitude
amplitude i chose this
equilibrium
equilibrium
frequency
Use the table to answer the question.
Wave λ
(m) vw
(m/s)
L 120 600
M 150 600
N 100 600
O 50 600
The table shows information about four waves. Which wave has the lowest frequency?
(1 point)
Responses
wave N
wave N i chose this
wave M
wave M
wave L
wave L
wave O
A student moves the end of a compressed coiled spring up and down to demonstrate wave motion. She then moves the compressed coiled spring faster but keeps everything else the same. Which characteristic will increase?(1 point)
Responses
amplitude
amplitude
crest
crest
frequency i chose this
frequency
wavelength
wavelength
Your answers are correct!
1. Compared to wave A, wave B has a shorter wavelength and greater frequency.
2. When drawn on a coordinate plane with the x-axis as the baseline, a wave with a crest that is closer to the baseline has a smaller amplitude.
3. Among the four waves in the table, wave N has the lowest frequency.
4. If the student moves the compressed coiled spring faster while keeping everything else the same, the characteristic that will increase is the frequency.
All waves carry:(1 point)
Responses
Energy
Energy
Light
Light
Particles
Particles
Matter
All waves carry energy.
Which of these would be the most reliable method for transmitting waves for communication?(1 point)
Responses
The use of the postal service to mail a letter.
The use of the postal service to mail a letter.
The use of printed newspapers and magazines.
The use of printed newspapers and magazines.
The use of knocking on all the doors in the neighborhood.
The use of knocking on all the doors in the neighborhood.
The use of fiber optics to transmit a digital signal. i chose this
You are correct. The most reliable method for transmitting waves for communication would be the use of fiber optics to transmit a digital signal. Fiber optics allow for high-speed, efficient, and reliable transmission of data using light waves.
Which of these is an advantage of digital storage of information over analog?(1 point)
Responses
A copy of an analog file is never as good as its original.
A copy of an analog file is never as good as its original.
Analog storage of information is continuous and captures a more pure sound.
Analog storage of information is continuous and captures a more pure sound.
Analog signals take up less bandwidth or storage space than digital.
Analog signals take up less bandwidth or storage space than digital.
Sound can be recorded either digitally or using analog techniques. i chose this
The correct response is: Analog signals take up less bandwidth or storage space than digital.
One of the advantages of digital storage of information over analog is that digital signals can be compressed and encoded more efficiently, resulting in smaller file sizes and requiring less storage space or bandwidth. Digital storage allows for higher capacity and greater flexibility in storing and transmitting information compared to analog storage methods.
Digital recording and transmission often requires the signal to be transmitted using a code. Which statement would suggest an advantage of this fact?(1 point)
Responses
Coding of the signal can keep the information secret during transport.
Coding of the signal can keep the information secret during transport.
Coded information may require larger bandwidth to transmit.
Coded information may require larger bandwidth to transmit.
Coding may require more time to record information.
Coding may require more time to record information.
Coding requires all users to have a method to decode information.
The advantage of coding the signal is that it can keep the information secret during transport. By using a code, the transmitted data can be encrypted or encoded in such a way that only authorized individuals or systems can decode and access the information. This provides a layer of security and confidentiality during transmission, making it more difficult for unauthorized individuals to understand or intercept the data.
Digital recording and transmission often requires the signal to be transmitted using a code. Which statement would suggest an advantage of this fact?(1 point)
Responses
Coding of the signal can keep the information secret during transport.
Coding of the signal can keep the information secret during transport.
Coded information may require larger bandwidth to transmit.
Coded information may require larger bandwidth to transmit.
Coding may require more time to record information.
Coding may require more time to record information. i chose thus
Coding requires all users to have a method to decode information.
Apologies for the confusion earlier. The statement that suggests an advantage of coding the signal is: "Coding of the signal can keep the information secret during transport." By utilizing a code or encryption, the transmitted data can be protected and remain confidential during transmission, guarding against unauthorized access and ensuring data security.
Consider any ocean wave. What is the relationship between an ocean wave and the energy of that wave?
(1 point)
Responses
Wave energy decreases as the wave moves closer to shore.
Wave energy decreases as the wave moves closer to shore.
The greater the wavelength, the more kinetic energy the wave has.
The greater the wavelength, the more kinetic energy the wave has.
Wave energy increases with frequency and decreases with wavelength.
Wave energy increases with frequency and decreases with wavelength.
Wave energy is directly proportional to the amplitude of the wave.i chose this
I apologize, but your choice is incorrect. The correct answer is: "Wave energy increases with frequency and decreases with wavelength."
In general, the energy of an ocean wave is directly related to its frequency and indirectly related to its wavelength. Waves with higher frequencies (more wave cycles per unit time) tend to carry more energy. Conversely, waves with shorter wavelengths (distance between two consecutive peaks or troughs) tend to have higher energy. Therefore, as frequency increases, wave energy increases, and as wavelength decreases, wave energy also increases.
Examine the timeline of relaying information to other people over the past few hundred years.
Pony Express --> US Postal Mail --> Fax Machine --> Digital Image Submission
Which statement explains the reasons for this progression in information delivery?
(1 point)
Responses
The quality of the information became less reliable as more digital technology was used.
The quality of the information became less reliable as more digital technology was used.
The storage of information became more difficult as more digital technology was used.
The storage of information became more difficult as more digital technology was used.
The relay of information became more reliable as digital technology was used.
The relay of information became more reliable as digital technology was used.
The relay of information became less trustworthy as more digital technology was used.
The statement that explains the reasons for this progression in information delivery is: "The relay of information became more reliable as digital technology was used."
With the advancement of digital technology, the relay of information became more reliable compared to previous methods like the Pony Express, US Postal Mail, and Fax Machine. Digital communication allows for faster and more efficient transmission of information, reducing the chances of errors or loss during the transmission process. Therefore, the reliability of information delivery improved with the adoption of digital technology.
All waves carry:(1 point)
Responses
Energy this is what i chose
Energy
Light
Light
Particles
Particles
Matter
Letter D represents the ________ of the wave.
(1 point)
Responses
Frequency
Frequency
Amplitude this is what i chose
Amplitude
Wavelength
Wavelength
Crest
Which of these would be the most reliable method for transmitting waves for communication?(1 point)
Responses
The use of the postal service to mail a letter.
The use of the postal service to mail a letter.
The use of printed newspapers and magazines.
The use of printed newspapers and magazines.
The use of knocking on all the doors in the neighborhood.
The use of knocking on all the doors in the neighborhood.
The use of fiber optics to transmit a digital signal.
The use of fiber optics to transmit a digital signal this is what i chose.
Your answers are all correct!
1. All waves carry energy.
2. Letter D represents the amplitude of the wave.
3. The most reliable method for transmitting waves for communication would be the use of fiber optics to transmit a digital signal. Fiber optics allow for high-speed, efficient, and reliable transmission of data using light waves.
Which of these is an advantage of digital storage of information over analog?(1 point)
Responses
A copy of an analog file is never as good as its original.
A copy of an analog file is never as good as its original.
Analog storage of information is continuous and captures a more pure sound.
Analog storage of information is continuous and captures a more pure sound.
Analog signals take up less bandwidth or storage space than digital.
Analog signals take up less bandwidth or storage space than digital. i chose
Sound can be recorded either digitally or using analog techniques.
Digital recording and transmission often requires the signal to be transmitted using a code. Which statement would suggest an advantage of this fact?(1 point)
Responses
Coding of the signal can keep the information secret during transport.
Coding of the signal can keep the information secret during transport. i chose
Coded information may require larger bandwidth to transmit.
Coded information may require larger bandwidth to transmit.
Coding may require more time to record information.
Coding may require more time to record information.
Coding requires all users to have a method to decode information.
Coding requires all users to have a method to decode information.
Which of these waves would have the greatest amount of energy?
(1 point)
Responses
A i chose
A
B
B
Their energy is equal.
Their energy is equal.
There is not enough information.
Which wave has the highest amplitude?(1 point)
Responses
i chose the second one
We know that waves transmit energy. There are many types of waves: light, microwaves, x-rays, sound waves, and ocean waves are all examples of waves transferring energy. Ocean waves are a renewable energy source that uses the energy of the waves to generate electricity.
Consider any ocean wave. What is the relationship between an ocean wave and the energy of that wave?
(1 point)
Responses
Wave energy decreases as the wave moves closer to shore.
Wave energy decreases as the wave moves closer to shore.
The greater the wavelength, the more kinetic energy the wave has.
The greater the wavelength, the more kinetic energy the wave has.
Wave energy increases with frequency and decreases with wavelength.
Wave energy increases with frequency and decreases with wavelength.this one
Wave energy is directly proportional to the amplitude of the wave.
Wave energy is directly proportional to the amplitude of the wave.
Elaborate on the difference between the energy of the two waves seen here:
(1 point)
Responses
Wave A has more energy than Wave B because the wavelength of Wave A is greater.
Wave A has more energy than Wave B because the wavelength of Wave A is greater.
Wave energy is directly proportional to frequency and wavelength, therefore Wave A has more energy.
Wave energy is directly proportional to frequency and wavelength, therefore Wave A has more energy.
Wave B has more energy: the amplitude of Wave B is double that of Wave A.
Wave B has more energy: the amplitude of Wave B is double that of Wave A. this one
Wave B has more energy than Wave A because the frequency of Wave B is greater.
Examine the timeline of relaying information to other people over the past few hundred years.
Pony Express --> US Postal Mail --> Fax Machine --> Digital Image Submission
Which statement explains the reasons for this progression in information delivery?
(1 point)
Responses
The quality of the information became less reliable as more digital technology was used.
The quality of the information became less reliable as more digital technology was used.
The storage of information became more difficult as more digital technology was used.
The storage of information became more difficult as more digital technology was used.
The relay of information became more reliable as digital technology was used.
The relay of information became more reliable as digital technology was used.this one
The relay of information became less trustworthy as more digital technology was used.