Answer:
1. 167.55
2. 10.77
Step-by-step explanation:
For #1 use the formula for volume of cone:
, and for #2 use the Pythagorean Theorem: 
Answer:
To solve this problem, we can use a system of equations.
We know the quadratic expression has the form

Using points (1,12) and (4,0), we can form the following system to find a and b.


We need to divide the second equation by -4 and sum both equations


Then, we use this value to find the other variable

<h3>Therefore, the quadratic function that models the situation is</h3>
or 
According to this expression, after 2 seconds, the height is 16 feet.

Answer:
(2x+1)(x+7)
Step-by-step explanation:
Guess and Check
(2x+7)(x+1) = 2x^2+9x+7. NOPE
(2x+1)(x+7) = 2x^2+15x+7. YES