How do you get diameter from radius

Craig likes to collect vinyl records. Last year he had 10 records in his collection. Now he has 12 rerecords. What is the percent increase pf his collection?

1. Matthew took a quiz with 20 questions. If he answered 16 of them correctly, what percent score did he earn on the quiz?

An airline wants to select a computer software package for its reservation system. Four software packages (1, 2, 3, and 4) are commercially available.

Write the phrase as an expression then evaluate x=3 and y=15 7 more than the quotient of a number y and 5

How do you write 3,966 in expanded form

For the first 4 class periods of day, Lewis has science history, math, and English, but not necessarily in that order. He does not have science or hist first period. He does not have math, English, or science second period.

I don' need sleep i need answers x2+10x = - 9 x2-14x+40=-5

Each blade on a windmill is in the shape of a triangle with a base of 7 ft and height of 4 ft if there are four blades on the windmill, what is the total area of the blades.

A woman earned wages of $42500, received $2800 in interest from a savings account, and contributed $3200 to a tax-deferred retirement plan. She was entitled to a personal exemption of $4050 and had deductions totaling $6540.

If Santiago wanted to turn his $279.89 into as many nickels as possible, how many would he have?