The radius r of a circle is increasing at a rate of 8 centimeters per minute. find the rate of change of the area when r = 39 centimeters

Jeremy has 3 yards of ribbon to use for wrapping gifts. he cuts the ribbon into pieces that are 1/4 yard long. how many pieces of ribbon does Jeremy have?

Jack was 9 years older than Priscilla. Together their ages totaled 165 years. What were their ages?

An account earns simple interest. (a) Find the interest earned. (b) Find the balance of the account. 1. $2600 at 3.2% for 4 years Interest balance 2. $7500 at 8.5% for 3 months interest balance

Give one combination of two factors whose product is 0.36, of one of the factors is a whole number greater than 1?

What is 4 divided by 448 long division?

A1.0 kg cart moving right at 5.0 - - on a frictionless track collides with a second cart moving left at 2.0 m/s. The 1.0 kg cart has a final speed of 4.0 m/s to the left, and the second cart has a final speed of 1.0 m/s to the right.

The formula I = PRT where I = Interest, P = principal, R = rate, and T = time is used to calculate the amount of simple interest earned. Solve for T.

How are the ratios 100/2, 150/3, 175/3.5, 200/4 related to 50/1?

Divide and answer in simplest form: 9: 6 5

A sample of 2,845 auto workers was selected to learn if they would go on strike. Over 50% of those in the sample declared they would strike.