Question 1195705
the equation is h = 3500 - 5t^2
h is the height.
t is the time.


when t = 10, the equation becomes h = 3500 - 5 * 10^2
solve for h to get:
h = 3000.


when the divers open their chutes at a height of 1000 meters, the equation becomes 1000 = 3500 - 5t^2.
add 5t^2 to both sides of the equation and subtract 1000 from both sides of the equation to get:
5t^2 = 3500 - 1000
simplify to get:
5t^2 = 2500
divide both sides of the equation by 5 to get:
t^2 = 500
solve for t to get:
t = sqrt(500) = 22.36067977.


the equation can be graphed.
just replace h with y and t with x to get:
y = 3500 - 5x^2.
y is the height.
x is the time.
the graph is shown below.


<img src = "http://theo.x10hosting.com/2022/072302.jpg">


let me know if you have any questions.
theo