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Mathematics 3 Online
OpenStudy (anonymous):

[9.06] A firecracker shoots up from a hill 165 feet high with an initial speed of 110 feet per second. Using the formula H(t) = −16t2 + vt + s, determine how long it will take the firecracker to hit the ground.

hartnn (hartnn):

to hit the ground H(t) must be = 0 v=110,and s=165 is given ,just plug in these values and find t....can u solve the quadratic equation which u will get in t?

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