The area of  a rectangle is found to be 250cm2. If its width is 150mm, what is its length in meters?

Acre-feet (af) is a unit that some non-scientists unwisely use to measure volume of liquids. By definition 1 acre foot is one foot multiplied by 1 acre. 1 acre is equal to about 4 × 104 ft2 . 1. How many cubic feet are in an acre-foot?

3.

If the walls in a room are 80.2 m2 in area and a gallon of paint covers 15.0 square yards, how many gallons of paint are needed to paint the room? The following equalities should prove useful: 1 inch = 2.54 cm, 1 foot2 = 144 inch2, 3 ft = 1 yard.

A silver sphere with a radius of 5.8 cm weighs the same as a certain aluminum cube. How long are the sides of this cube (in cm)?

A cell membrane is 4.81 nm thick. How thick is it in inches?

U.S. football field is 120 yards long (including the end zones). How long is the field in the following units of measurement? (a) meters (b) millimeters mm (c) feet ft (d) inches in

- Your answer is partially correct. A partly-full paint can has 0.515 U.S. gallons of paint left in it. (a) What is the volume of the paint, in cubic meters? (b) If all the remaining paint is used to coat a wall evenly (wall area = 12.1 m²), how thick is the layer of wet paint? Give your answer in meters. (a) Number i 1.949 (b) Number i 312.1 Units Units m^3 m^2

One gallon of paint (volume = 3.78 × 10-³m³) covers an area of 25.0m². What is the thickness of the fresh paint on the wall?

One cm3 of gold is 19.32 g. What is the density (ratio of mass to volume) of gold inkg per m3 ?  I know the answer is 19.32x10^3 but can someone tell me the steps to get there?