jessicaaflores13
25.11.2019 •
Mathematics
Suppose a flare is shot from the top of a 120 foot building at a speed of 160 feet per second. the equation h = −16t + 160t + 120 models the h height at t seconds of the flare. how long will it take for the flare to hit the ground? (to the nearest tenth of a second)
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Ответ:
10.7 sec.
Step-by-step explanation:
When the flare hits the ground, the height of the flare will be equal to 0; that is h = 0.
We substitute h with 0 in the equation and solve for t. This can be done graphically or analytically. Kindly find the attached for the graphical solution.
From the graph, we see that h is 0 when t is 10.7 sec.
Ответ:
B: 8%
Step-by-step explanation:
It asks for percentage of total students, so we add the male and female student totals for a total of 150 students. We also add the numbers of those that are left handed for a total of 12. We divide 12 by 150 (12/150) to get the decimal, 0.08, which is 8%.