Alice earned 622.50 on her saving in the bank. before interest the account had 12,450. what is the approximate percent she earned in interest

Solve the system of equations y= 3/2 - 1, -x+ y =-3

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Asix-sided die of unknown bias is rolled 20 times, and the number 3 comes up 6 times. in the next three rounds (the die is rolled 20 times in each round), the number 3 comes up 6 times, 5 times, and 7 times. the experimental probability of rolling a 3 is 10 %, which is approximately % more than its theoretical probability. (round off your answers to the nearest integer.)