Answer:
2 seconds
Step-by-step explanation:
This means the height, and thus h(t), is equal to zero.
0=-16t^2 + 16t + 32
0= t^2 - t - 2 (divide both sides by -16)
0 = (t-2)(t+1) [factor]
t = -1, 2 [set each factor equal to zero]
But as time cannot negative, take t=2, giving us 2 seconds.
Answer:
i'm not sure but i think it's B or C
Step-by-step explanation:
Answer:
28 oz of water
Explanation:
Percentage of salt in the original solution = 15%
Let the amount of water to be evaporated = w
If we remove w oz of water from 70 oz solution, the resulting solution contains:

So, we have the equation:

We then solve for w:

Thus, 28 oz of water must be evaporated from a 70 oz, 15% saline solution to produce a 25% saline solution.
Answer:
3 to the power of 5 = 35 = 243
Step-by-step explanation: