Dory bought 2 computers on sale for $210.99 each. He sold them to his friend for $240.00
each. What was his profit?
$52.99
$58.02
$421.98
$480.00
What is 0.00000512 in scientific notation?
5.12 × ^106
512 × ^105
5.12 × ^10–6
512 × ^10–5
what is 31/4 written as a decimal?
6.75
7.50
7.75
8.25

Question

Dory bought 2 computers on sale for $210.99 each. He sold them to his friend for $240.00
each. What was his profit?
$52.99
$58.02
$421.98
$480.00 
What is 0.00000512 in scientific notation? 
5.12 × ^106
512 × ^105
5.12 × ^10–6
512 × ^10–5 
what is 31/4 written as a decimal? 
6.75
7.50
7.75
8.25

koikkara · Answer

Please try yourself and check answers. @supercait10

Answers: 
1. $58.02
2.  5.12*10-6
3. divide 31/4= 7. ??