I'm confused please an do have 4 other ones that I dont understand first to answer with correct answer will get marked brainliest

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

Olive's solar powered scooter travels at a rate of 30 miles per hour. what equation can she use to calculate her distance with relation to the time she traveled? h=hours m=miles 1. h=m+30 2. m=30h 3. m=h+30 4. h=30m

What number is 7 units left of -15?