Answer:
46.57
Step-by-step explanation:
Given that:
h(t) = 37t - 4.9t²
When the ball reaches the ground, then the height is zero;
So, we equate h(t) to zero and solve for t
37t - 4.9t² = 0
t = 0, 7.55
Let the Initial time be a = t = 0
The time the ball reaches the ground be b = 7.55
So, the average height can now be calculated as:
Average height =
=
=
=
= 46.57091665
≅ 46.57 to (2 decimal places)
Answer:
N - 2 r t²
x = - ------------
7x
Step-by-step explanation:
N = 2 r t² - 7 r x
solve for x
N = 2 r t² - 7 r x
N + (-2 r t²) = (2 r t² - 7 r x) + (-2 r t²)
N - 2 r t² = 2 r t² - 7 r x - 2 r t²
N - 2 r t² - 2 r t² + 2 r t² = - 7 r x
N - 2 r t² = 7 r x
therefore,
N - 2 r t²
x = - ------------
7x
Answer:
2. 0.93
3. 1.13
Step-by-step explanation:
2. 0.93
decreasing means - to the 100%
3. 1.13
increasing means + to 100%
False, .0034 is 1/10 of .034