Width of a rectangle with an area of 42 square inches and a length of 16.8 inches

2.5 inches

Step-by-step explanation:

The area is given by the formula ...

A = LW

Putting in the given numbers for length (L) and area (A), we can find width (W).

42 in^2 = (16.8 in) W

42 in^2 / (16.8 in) = W = 2.5 in

The width of the rectangle is 2.5 inches.

4.2 inches

Step-by-step explanation:

The formula to find the area of a rectangle is A=2L+2W

When you plug in the information you already have, the equation is now 42=2 (16.8) + 2W.

Multiply 2 and 16.8 to get 42=33.6+2W

Subtract 33.6 from 42 and you get 8.4=2W

Divide both sides by 2 and you get 4.2=W