A tennis ball has a diameter of 6.7 cm. What is its surface area?

The amount cami raised during last year’s charity walk, $45.50, is 7/10 of the amount she raised this year. which equation represents n, the number of dollars she raised this year?

In cents, what is the least total amount that cannot be obtained by using a combination of fewer than eight coins from a collection of pennies, nickels, dimes and quarters?

The coordinates of one point of a line segment ate (-2,-7). the line segment is 12 units long. give three possible coordinates of the line segment’s other end point.