When the firecracker hits the ground, H(t) = 0.0 = -16t^2 + 90t + 160 Using the quadratic formula,t = (-90 +- sqrt(90^2 - 4(-16)(160))) / 2(-16)t = -1.42 ort = 7.04
The negative time is extraneous. Therefore,t = 7.04 s.
Seven Seconds is your answer!
Answer:idk help
Step-by-step explanation:
Answer:
Step-by-step explanation:
x=3 and x=-4 are parallel, vertical lines
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x-y = 3, slope = 1
2x-2y = 10, slope = 1
Parallel lines
