If a rectangle measures 8 feet on the short side and 9.8 feet on the long side.What is the area of the rectangle in square feet?

2 Answers
Apr 20, 2018

A=78.4 "ft"^2

Explanation:

Multiply the length and width of the rectangle to find its area:

A=9.8*8

A=78.4 "ft"^2

Remember your units!

Apr 20, 2018

If the decimal is giving you a problem consider this approach.

78.4 color(white)(.)ft^2

Explanation:

We have: 8" feet"xx9.8" feet"

But 9.8 is the same as 98xx1/10

So re-write as:

8xx98xx1/10 " ft"^2

color(white)("d")color(white)(.)9color(white)(..)8
ul(color(white)("d")color(white)(9999)8larr" Multiply")
ul(7color(white)(.)8color(white)(..)4)
color(white)("dd")6

Now we multiply by 1/10 to give:

784 color(white)(.)ft^2xx1/10= 78.4 color(white)(.)ft^2