Two friends, Ryan and Tressa, are on vacation. They decide to go bungee jumping off a platform. Their height from the ground can be modeled by the function y = 4x^2-32x+80, where the x represents the time after they jumped and y represents their height above ground. How high is the platform off the ground?

80 units

Step-by-step explanation:

Step 1 :

Given,

The function representing the height is y = 4x^2-32x+80

where the x represents the time after they jumped and y represents their height above ground.

We need to find the platform's height.

Step 2 :

Since x represents the time after they jumped, x = 0 when they have not started jumping and the corresponding y will give the height before they start jumping which would be the height of the platform

Step 3:

When x = 0 we have

y = 0-0+80 = 80

So the height of the given platform is 80 units.

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.