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hopkinbr
10.09.2019 •
Mathematics
The function -6t^2+5t+56=h is used to calculate the amount of time (t) in seconds it takes for an object to reach a certain height (h). according to this function, how many seconds will it take for the object to hit the ground?
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Ответ:
3.5 seconds
Step-by-step explanation:
h(t) is a quadratic function, it indicate that the object start with initial height (56).
If you want to know when the object hit the ground (h=0) you have to use the quadratic formula
and take the positive root (the negative shows a negative time, so we have to discard it).
In this case: a=-6, b=5 and c=56, then the solve is 7/2=3.5
Ответ:
a. 26 x 0.02584 = 0.67
b. 15.3: 1.1 = 14
c. 782.45 - 3.5328 = 778.92
d. 63.258 + 734.2 = 797.5