Hi:) anyone able to help with this question ? I don’t understand it. Thank you :)!

It is possible for John to catch the key.

Explanation:

Given:

height, h = 6m

h = -11t² + 20t + 1

Substituting h = 6m in the equation

6 = -11t² + 20t + 1

11t² - 20t + 5 = 0

On solving the above quadratic equation we get

t = 1.5 seconds approximately.

Thus, we can say that John will be able to catch the key because the key reaches to him in 1.5 seconds.

answer: there are 453.592 grams in a pound.

step-by-step explanation:

use pothagarean therom

a^2+b^2=c^2 so first ac

acm is a right triangle because c= 90°

and am (the hypotenuse or c) =16+9 =25

but there is not enough info we need another angle or side length