4.0 × 10-2 written in standard notation is 0.040
-700
8.04*10^-2 = 0.0804
.983
10-2 = 100
3 times 10 to the 8th power divided by 7 times 10 to the negative 7th power equates to: 4.28571428571
10 to the second power is the inverse of 10 to the negative second power. 10 to the 2nd power is 100 so the inverse of 100 is 1/100 or .01 so 10 to the negative second power is written as 10-2 which is equal to 1/100 or 0.01.
The decimal form of 7.73 times 10 to the negative third power is 0.00773
7.9 times 10 to the negative 6 power in standard notation = 0.0000079
take the negative out of that power and place it as 10/-1
It is: (8*10^-3) divided by (5*10^-5) = 160
the answer is 300