For question number one you have to understand what your X and Y variables are. Time is always positive and most of the time the independent variable, so lets call Time-X and your height as you jump Y. Then as time goes on it will look like you've made three hills on the graph.
Imagine this as a circle. The circle will have a radius of 17mi and the lighthouse will be in the middle. The area of the circle will be the area over which the beacon can be seen.

is the equation for the area of the circle where A is the area.
Now we simply plug in our information
A=

A=907.9
Answer:y 43
Step-by-step explanation:
Kesha has to pay $142.5 if i got it wrong my apologies