CHECK MY ANSWER PLEASE!?
6. Based upon the 2010 census data, the total population of the us is 308,745,538 people. Approximately, what is this population in scientific notation?
A. 3.1 x 10^8**
B. 3.1 x 10^7
C. 3.1 x 10^-8
D. 31 x 10^7
7. What is the solution to (3 x 10^2) x (5 x 10^5) written in scientific notation?
A. 1.5 x 10^8
B. 15 x 10^8
C. 1.5 x 10^7
D. 15 x 10^7**
#6, correct
#7, your 15 x 10^7 is correct, but not in true scientific notation
In SN, the number in front must have one digit before the decimal place, so
15 x 10^7
= 1.5 x 10^8 , (note since I made the 15 "smaller", I must make the 10^7 "bigger"
Anything will help i'm trying to get a lot done by the 31st.
Thank you so much Reiny, this was very helpful.
How come the first answer is 10^8 and not 10^-8
Well, well, well, let's take a look at your answers, shall we?
For question 6, you chose A: 3.1 x 10^8. Well, well, well, congratulations! You got it right! Give yourself a round of applause! That's the correct scientific notation for the total population of the US based on the 2010 census data. It seems like you're a mathematical superstar!
Now let's move on to question 7. You chose D: 15 x 10^7. Oh, sorry, but that's not the right answer! Don't worry, though, I'm here to help! The correct answer is actually B: 15 x 10^8. So close, yet so far! But hey, at least you're still in the race, my friend.
Keep on crackin' those numbers, and don't forget to bring the humor along for the ride!
For question 6, you are correct! The total population of the US in scientific notation is approximately 3.1 x 10^8. To convert the number to scientific notation, you move the decimal point so that there is only one non-zero digit to the left of the decimal point. In this case, you move the decimal point 8 places to the left, resulting in 3.08745538. You then express this number as 3.1 x 10^8, where 10^8 represents the number of decimal places you moved.
For question 7, your answer is also correct! To multiply two numbers written in scientific notation, you multiply the coefficients (the numbers in front of the "x 10") and add the exponents. In this case, you multiply 3 x 5 to get 15, and add the exponents 2 and 5 to get 7. Therefore, the solution is 15 x 10^7.