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
Mathematics
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