Answer:
4.5 seconds
Step-by-step explanation:
Given
h = - 16t² + 72t
When the ball hits the ground, then h = 0 , equating to zero gives
- 16t² + 72t = 0 ( divide through by - 8 )
2t² - 9t = 0 ← in standard form
t(2t - 9) = 0 ← in factored form
Equate each factor to zero and solve for t
t = 0 ← time when ball is thrown
2t - 9 = 0 ⇒ 2t = 9 ⇒ t = = 4.5 ← time when ball hits ground
The ball hits the ground after 4.5 seconds
Answer:
Step-by-step explanation:
In the table, they give you an x-value. Use the x-value to solve for y. You will then get a point. Plot the points to find the graph.
y = 1/2x
y = 1/2(0)
y = 0
(0, 0)
y = 1/2x
y = 1/2(2)
y = 1
(2, 1)
y = 1/2x
y = 1/2(-4)
y = -2
(-4, -2)
Answer: 6.25 cm
Step-by-step explanation:
Area of parallelogram
Using base as AB and height as DE
Now, using base BC and height as DF
Equating area
