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VMariaS [17]
3 years ago
5

The function H(t) = −16t2 + 96t + 80 shows the height H(t), in feet, of a projectile after t seconds. A second object moves in t

he air along a path represented by g(t) = 31 + 32.2t, where g(t) is the height, in feet, of the object from the ground at time t seconds.
Part A: Create a table using integers 2 through 5 for the 2 functions. Between what 2 seconds is the solution to H(t) = g(t) located? How do you know? (6 points)

Part B: Explain what the solution from Part A means in the context of the problem. (4 points)

Mathematics
1 answer:
Oksi-84 [34.3K]3 years ago
8 0
<span>we have that

H(t) = −16t</span>²<span> + 96t + 80
</span><span>g(t) = 31 + 32.2t

Part A)
see the attached table
</span><span>the solution to H(t) = g(t) is between t=4 sec and t=5 sec
for t=4 sec
H(4)=208 ft   and g(4)=159.8 ft
so
H(t) > g(t)

 </span>for t=5 sec
H(5)=160 ft   and g(5)=192 ft
so
H(t) < g(t)

<span>that change of H(t) from being greater to becoming smaller tells me that the solution is in that interval [4, 5]
</span>
Part B)<span>Explain what the solution from Part A means in the context of the problem
</span>when H(t)=g(t) means <span>that the projectile destroyed the object N 2 in the interval [4,5]

to find the exact solution

</span>−16t² + 96t + 80=31 + 32.2t
−16t² + 96t + 80-31-32.2t=0
−16t² + 63.8t + 49=0<span>

using a graph tool
see the attached figure

the exact solution is 
t=4.65 sec</span>

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