Solve the problem.An explosion causes debris to rise vertically with an initial velocity of 160 feet per second. The function  describes the height of the debris above the ground, s(t), in feet, t seconds after the explosion. What is the instantaneous speed of the debris when it hits the ground?

A. -160
B. 320
C. 160
D. -320


Answer: A

Mathematics

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Find the vector projv u.v = 2i - 2j - 4k, u = 5i - 12k

A. i - j - k
B. i - j - k
C. i  - k
D. i  - k

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Factor the trinomial. ?   ?

A.
B.
C.
D.
E.

Mathematics

Find the domain and range for the indicated function.f(x) = ,g(x) = ;f ? g

A. D: x ? 3 R: y > 0 B. D: x > 3 R: y ? 0 C. D: x ? 3 R: -? < y < ? D. D: x ? 3 R: y ? 0

Mathematics

Complete the sketch so that it has the indicated symmetry.Complete the sketch so that it has 90° rotational symmetry about O.

What will be an ideal response?

Mathematics