80 book to 64 books what is the percentage of change

The school track has eight lanes. Each lane is 1.25 meters wide. The arc at each end of the track is 180. The distance of the home straight and the radii for the arcs in the 1st 4 lanes are given. S=85m r1=36.5m r2=37.75m r3=39m r4=40.

Cody has 700$ in a savings account that pays 4% simple interest. What is the amount of simple interest he will earn in 2 years?

If the rectangle below is englarged using a scale factor of two what will be the perimeter and area of the new rectangle

How much water must be evaporated from 32 ounces of a 7% salt solution to make a 8% salt solution. Answer in ounces.

Zero is an element of the set of natural numbers true or false

Jeff mordan drives 140 miles in 4 hours

Mr. Piper's plumbing needed repairs. The plumber charged $98 for parts plus $45 per hour for labor. If the bill totaled $458 how many hours of labor were required?

I need to find the volume of the cylinder

Three angles of a hexagon are congruent. The other three angles are also congruent, each with a measure twice that of the first three. What is the measure of each angle?

Factor 6x^2+x-2 / 3x^2+14x+8