Help please! lots of points!
20 points, TOO HELP PLEASE IM DESPARATE!

You and a friend race across a field to a fence and back. your friend has a 50-meter head start. the equations shown represent you and your friend's distances dd (in meters) from the fence tt seconds after the race begins. find the time at which you catch up to your friend. you: d=∣−5t+100∣d=∣−5t+100∣ your friend: d=∣−313t+50∣∣

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

Evaluate the expression. (9 + 5)(3 + 2)0