Petra invests $10 800. After 4 years she has earned $3240 in interest. At what annual rate of interest did she invest her money?

There are 4 cups in a quart and 4 quarts in a ganon.jug of water? . how many cups are in a 5-gallon jug of water?

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.

Ahighway between points a and b has been closed for repairs. an alternative route between there two locations is to travel between a and c and then from c to b what is the value of y and what is the total distance from a to c to b?