Someone help please!!!
A basketball is thrown upwards. The height f(t), in feet, of the basketball at different times t, in seconds, is shown by the following function:
f(t) = -16t2 + 94t + 12

Which of the following is a reasonable domain of the graph of the function when the basketball falls from its highest height to the ground? (4 points)

3 ≤ x ≤ 6

2 ≤ x ≤ 5

1 ≤ x ≤ 4

0 ≤ x ≤ 3

Question

Someone help please!!!
A basketball is thrown upwards. The height f(t), in feet, of the basketball at different times t, in seconds, is shown by the following function:
f(t) = -16t2 + 94t + 12

Which of the following is a reasonable domain of the graph of the function when the basketball falls from its highest height to the ground? (4 points)

		
3 ≤ x ≤ 6
		
2 ≤ x ≤ 5
		
1 ≤ x ≤ 4
		
0 ≤ x ≤ 3

jdoe0001 · Answer

hmmm have you covered parabolas yet?  or quadratic equations that is

anonymous · Answer

i believe so... and i figured out the last problem. it was -1

anonymous · Answer

i think its C

jdoe0001 · Answer

hmm ok.. how did you get C?

anonymous · Answer

well im not sure. and i guarentee i dont know how to solve these

jdoe0001 · Answer

hmm ok well
let us notice first off, is a quadratic equation
so its graph is a parabola

the leading term coefficient is negative
meaning the parabola is opening downwards|dw:1438296963025:dw|