**24. The number of lawn mower-related accidents per year, A, in a certain U.S. state can be modeled by: A=798-4t**

where t is the number of years since 2000. If the trend continues, in what year will the number of accidents per year first drop below 764?

Ans.

798-4t=764

798-764=4t

34/4=t=8.5+2000=2008.5years

**25. If a circle has a radius of 13 inches, what is its area and circumference?**

Ans.

Area

A=πr^2=3.14×〖(13)〗^2=530.66〖in〗^2

Circumference,

c=2πr=81.64in