Question

NEED HELP ASAP 30 POINTS!

A leak in a water tank causes the water level to decrease by 3.6 x 10^-2mm each second.

About how many millimeters does the water level in the tank decrease in 5 hours, or 1.8 x 10^4 seconds?

Fill in the banks in scientific notation


__x__mm


A. 2

B. 5

C. 5.4

D. 6.5

E. 10^-8

F. 10^-2

G. 10^2

H. 10^6


Please help!

Answer 1

Ok, so to tackle this problem you have the speed, the time, and are looking for the distance. v=d/t, if you're familiar. Isolating d on one side, you get d=vt. Let's do just that.
d=3.6*10^-2*1.8*10^4
d=648 mm

There are 2 sig figs for both elements, so there should be 2 sig figs in the answer. (sig figs are significant figures.)
So the answer would be DG.