Post a and post b are 120 meters apart post b and post c are 300 meters apart. ben cycled from post a to b in 15 sec and post b to post c in 55 sec. find the average speed from post a to c

Suppose a pendulum is l meters long. the time,t,in seconds that it tales to swing back and forth once is given by t=2.01

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.