Multiying positive and negative interger

In a probability experiment, karen flipped a coin 76 times. the coin landed on heads 32 times. what percentage of the coin flips resulted in tails? round to the nearest percent. a. 58% b. 65% c. 42% d. 60%

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16

Which is f(5) for the function –2x2 + 2x - 3?