Your friend says that the volume of a sphere with radius r is four times the volume of a cone with radius r. When is this true? Justify your answer.

If the sides of two similar triangles are in the ratio 4:9, what is the ratio of their perimeters?

Ayana has 220 coins in her piggy bank. Of those total coins, 40% are pennies. How many coins are pennies?

Harry, hannah and howard are all going by train to london to watch the olympics. hannah departs on the 2:15 pm train. harry's train journey takes 50% longer than howard's. harry departs on the 3:00pm train.

Joyce paid $100 for an item at the store that was 20 percent of the original price. What was the original price?

The range of a projectile fired at an angle θ with the horizontal and with an initial velocity of v 0 feet per second is r = 1 v 20 sin 2θ where r is measured in feet. a golfer strikes a golf ball at 120 feet per second.

A taxi charges a flat fee of 4 dollars plus 2.25 per mile how much will it cost to travel 8.7 miles

What is the slope of the line between - 7,-2 and 9,4?

A cistern can be completely drained by a pipe in 6 hours. It can be filled by two pipes in 4 hours and 5 hours, respectively.

Demetrius is a salesman whose base pay

A spinner is split into 4 equal parts labeled 1, 2, 3, and 4. What is the probability of landing on an even number? (Write your final answer as a percentage.)