It takes 9 seconds to hit the ground.
Setting the equation equal to 0, we have:
0 = 144 + 128t - 16t²
Factoring out the GCF, we have
0 = 16(9 + 8t - t²)
Factoring out -1, we have:
0 = -16(-9 - 8t + t²)
In standard form, this is
-16(t² - 8t - 9) = 0
This is easily factorable; -9(1) = -9 and -9+1 = -8:
-16(t-9)(t+1) = 0
Using the zero product property, we know either t-9=0 or t+1=0; therefore t=9 or t=-1. Since negative time makes no sense, t=9.
The answer in D. 1.5a - 0.5
Answer:
it won't
Step-by-step explanation:
We assume the probability of heads for any (fair) coin is the same: 1/2. The kind of coin it is does not matter. That is, we assume the probability distribution of number of heads remains the same regardless of coin type.
Answer:
4.24
Step-by-step explanation:
Use the distance formula
She was wrong. the answer is 8, and she subtracted instead of multiplied. there is only 1 answer.