Simple....
you have: (3.2*103)+(5.78*105)
You want to simplify it..but first remember your order of operations...
1.) Remove the parentheses-->>
(3.2*103)=329.6
and
(5.78*105)=606.9
Which leaves you with...
329.6+606.9=
=936.5
Thus, your answer.
So first write out the expression:

take two 10's from the top to cancel with the two 10's on the bottom.
3.9/1.3 is 3.
The answer is 3*10^3
Answer:
21 is 84% to 25, so there would be 25 total questions on the test
239.99 x 75%(75/100) ~ $180
$180 x 90%(90/100) = $162
Answer:
2×9+6
=18+6
=24
i think i have give a correct answer