Can I have some help doing some of my math homework?

9. Dory bought 2 computers on sale for $210.99 each. He sold them to his friend for $240.00 each. What was his profit?
A. $52.99**
B. $58.02
C. $421.98
D. $480.00
10. What is 0.00000512 in scientific notation?
A. 5.12 x 10^6
B. 512 x 10^5**
C. 5.12 x 10^-6
D. 512 x 10^-5
11. What is 27/6 written as a decimal?
A. 4.2
B. 4.3**
C. 4.4
D. 4.5
Anything will help!

OMG Thank you so much Ms. Pi!!

You helped a lot!

You are very welcome! : )

#10 will need to be checked for sure... Think about the direction you have to move the decimal point.

#11 is not quite right yet...

27 divided by 6 is 4, and then there are three left out of 6...
that is 3/6 turned into a decimal number...

#9 is not quite right yet either...

sold for - bought for = profit.
then the profit is times by 2

I will be happy to check your re-do answers : )

So #11 would 4.4 instead of 4.3? p.s. I love your name

WHat is 3/6 as a decimal? It will help you with #11

For #10 it would be C or D but im thinking D so im not sure.

And #9 would be C?

For #10 check how many times you would move the decimal from 5.12 back to where it is in the original question. The number of movements will tell you the exponent.

3/6 would be 0.5 in decimals