michaela134
15.06.2021 •
Mathematics
Identify the domain of the function shown in the
graph.
A. X30
B. -4 sxso
C. x is all real numbers.
D. X20
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Ответ:
B
Step-by-step explanation:
The trick you need to employ is that when the rock hits the ground, the timer stops. So h must be taken as 0.
0 = - 16t^2 + 255 Set up the equation
- 255 = - 16t^2 Divide by -16
15.9375 = t^2 Switch
t^2 = 15.9375 Take the square root of both sides.
sqrt(t^2) = sqrt(15.9375)
t = 3.992 seconds
The closest answer is B