The dimensions of a fish tank are 5 ft by 4 ft by 2 ft. There are 40 fish in the tank. What is the population density of the fish tank? A. 2.0 fish per cu. ft.
B. 1.0 fish per cu. ft.
C. 0.5 fish per cu. ft.

Pls , the question is in the picture!

As part of an annual fundraiser to raise money for diabetes research, diane joined a bikeathon. the track she biked on was 1,920 yards long. diane biked 38.5 laps. her sponsors agreed to donate an amount of money for each mile she biked. how many miles did she bike? first fill in the blanks on the left side using the ratios shown. then write your answer. given ratios: 5280ft / 1 mi , 1 mi /5280 ft , 1,920 yards / 1 lap , 1 lap / 1,920 yards , 3 ft / 1 yard , 1 yard / 3 ft. blanks: 38.5 laps / 1 yard x (blank) x (blank) x (blank) = (blank) miles i'm really confused on how to do this, and the explanations aren't exactly . if you could walk me through how to do this, it would be greatly appreciated.

How many kilometers are equal to 5 miles? use 1 mile ≈ 1.61 kilometers. !