Question

You have to make 1000 buttons.the diameter of the button is 9cm but you have to find it’s area.its $15/m squared and you have to find how much it costs to make 1000 buttons.

Answer 1

$95.38

Explanation:

step 1

Find the area of one button

The area is equal to

`A=\pi r^(2)`

we have

`r=9/2=4.5\ cm` ---> the radius is half the diameter

Convert to meters

`r=4.5\ cm=4.5/100=0.045\ m`

assume

`\pi =3.14`

substitute

`A=(3.14)(0.045)^(2)\\A=0.0063585\ m^2`

step 2

Find the area of 1,00 buttons

Multiply by 1,000

`A=0.0063585(1,000)=6.3585\ m^2`

step 3

Find the cost

Multiply $15 per square meter by the total area of 1,000 buttons

`(15)6.3585=\$95.38`