Answer:
Step-by-step explanation:
a) the equation representing the parabola is expressed as
h = -16t² - 4t + 20
c) to determine the height after 25 seconds, we would substitute 25 for t into the given equation. It becomes
h = -16(25)² - 4(25) + 20
h = - 10000 - 100 + 20
h = - 10080
d) when the coin lands on the ground, the height would be 0. Therefore,
-16t² - 4t + 20 = 0
Dividing both sides of the equation by 4, it becomes
- 4t² - t + 5 = 0
- 4t² - 5t + 4t + 5 = 0
- t(4t + 5) + 1(4t + 5) = 0
- t + 1 = 0 or 4t + 5 = 0
t = 1 or t = - 5/4
Since t cannot be negative, then t = 1 second
Answer:
1
Step-by-step explanation:
x +2y=1
2y+x will equal 1
From the graph it appears that S′(5) 2 ≈ and S′(25) 2 ≈ − . The important
thing is that they do have opposite signs. The first means that at about 5ºC
the Coho gains about 2 cm/sec while at 25ºC it loses about 2 cm/sec in
maximum sustainable speed.
Ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
You should get 375 seconds which is 6 1/4 of a minute or 6 minutes and 15 seconds
