Question

A leak in a water tank causes the water level to decrease by 3.6×10−2 millimeters each second. About how many millimeters does the water level in the tank decrease in 5 hours, or 1.8×104 seconds?

Drag and drop the values to the boxes to express the answer in scientific notation.

2     5     5.4      6.5     10^-8     10^-2     10^2     10^6

--------x--------mm

Answer 1

The correct answer is 6.5 x 10^2.

We have the amount for 1 second. To convert to 5 hours, we need to multiply it by 60 and 60 and 5.

0.036 x 60 x 60 x 5 = 648

Or about 6.5 x 10^2