Let x = the width
then
2x = the length
:
The box dimensions: 2x by x by 4
Given the surface area:
2(2x*x) + 2(2x*4) + 2(x*4) = 220
:
4x^2 + 16x + 8x = 220
A quadratic equation:
4x^2 + 24x - 220 = 0
simplify, divide by 4
x^2 + 6x - 55 = 0
Factor
(x+11)(x-5) = 0
The positive solution is what we want here:
x = 5 ft is the width
then
2(5) = 10 ft is the length
:
Find the volume
10 * 5 * 4 = 200 cu/ft is the volume
The ball hits the ground when the height h(t) = 0 , so
-16t^2 + 80t = 0
-16t(t - 5) = 0
t- 5 = 0 or -16t^2 = 0 ( here t = 0 which corresponds to when ball is thrown)
t - 5 = 0 gives:-
t = 5 seconds (answer)
I believe it would be 20/15
Answer:
C
Step-by-step explanation:
2 in this case is the weight and 34 is pounds
the graph is 100% proportional
12oz(8in^3orange/1.25oz)=76.8 in^3 of oranges...
Vo=(4p(3.5/2)^3)/3=22.45 in^3 per orange...
76.8 in^3(orange/22.45 in^3)=3.42 oranges...
Round down to 3 oranges.
