Jack took 4 tests. on two tests jack received a score of 86, on one he received a score of 81, and on one he received a score of 79. if jack wants an average of 83, what score will he need to receive on his fifth test

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i