Determine whether the variation between the indicated quantities is direct or inverse.The height of a tower and the time it takes for a marble dropped from the top of the tower to hit the ground.
A. Inverse
B. Direct
Answer: B
Mathematics
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Solve the problem.A continuous random variable X has PDF f(x) = 
x(9 - x), 
Find E(X2).
A. 
B. 
C. 
D. 
Mathematics
Factor the polynomial by grouping.10x2 - 4x - 25x + 10
A. (10x + 5)(x + 2) B. (2x - 5)(5x - 2) C. (10x - 5)(x - 2) D. (2x + 5)(5x + 2)
Mathematics
Identify the indicated entry in matrix A.A = 
; identify a23.
A. 3 B. 4 C. 5 D. 6
Mathematics
For the given functions f(x) and g(x), find f(x) ? g(x).f(x) = x3 - 3x2 + 2x + 7, g(x) = -8x5
A. -8x8 - 24x7 + 16x6 + 56x5 B. -8x15 + 24x10 - 16x6 - 56x5 C. -8x15 - 24x10 + 16x6 + 56x5 D. -8x8 + 24x7 - 16x6 - 56x5
Mathematics