3. (2.56 x 10^6) x (3.56 x 10^2) =
a. 9.1136 x 10^12
b. 91.136 x 10^8
c. 9.1136 x 10^8
d. 91.136 x 10^12
4. In a recent year, the population of California was about 2.52 x 10^7 people. Its land area is about 4.05 x 10^5 km2. What was the average number of people per square kilometer?
a. 0.62 x 10^5
a. 6.2 x 10^1
a. 0.62 x 10^14
a. 6.2 x 10^9
>> I can't find the answer for these no matter what I try to do, please help.
I figured out all the answers. It’s D A C B. I got 4/4 on the test.
Dude is right!
To find the answer to both questions, we can use the rules of scientific notation and the properties of exponents.
For question 3, we have:
(2.56 x 10^6) x (3.56 x 10^2)
To multiply two numbers in scientific notation, you can multiply their coefficients and add their exponents. Therefore, we have:
(2.56 x 3.56) x (10^6 x 10^2) = 9.1136 x 10^8
So, the answer to question 3 is option c. 9.1136 x 10^8.
For question 4, we want to find the average number of people per square kilometer in California. We are given the population of California and its land area.
To find the average number of people per square kilometer, we need to divide the population by the land area. Dividing two numbers in scientific notation is done by dividing their coefficients and subtracting their exponents. Therefore, we have:
(2.52 x 10^7) / (4.05 x 10^5) = (2.52 / 4.05) x (10^7 / 10^5) = 0.62 x 10^2
Since the scientific notation is typically written with the coefficient between 1 and 10, we can rewrite this as:
0.62 x 10^2 = 6.2 x 10^1
So, the answer to question 4 is option b. 6.2 x 10^1.
I hope this helps! Let me know if you have any further questions.
(2.56E6)*(3.56E2)=
Put that in your google search window.
(2.52E7)/(4.05E5)=