Graph.y = - 
x + 4
A. 
B. 
C. 
D. 
Answer: B
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The vector r(t) is the position vector of a particle at time t. Find the angle between the velocity and the acceleration vectors at time t = 0.r(t) = ti + (
t + 
t2)k
A. ?
B. 0
C. 
D. 
Calculate the derivative of the function. Then find the value of the derivative as specified.f(x) = 
; f '(-1)
A. f '(x) = - 
; f '(-1) = -8
B. f '(x) = 
; f '(-1) = 8
C. f '(x) = 8; f '(-1) = 8
D. f '(x) = - 8x2; f '(-1) = - 8
Given a normal distribution with mean 120 and standard deviation 5, find the number of standard deviations the measurement is from the mean. Express the answer as a positive number.134.9
A. 2.98 B. 2.18 C. 3.25 D. 3.02
Solve the problem.Jason made an extra $9000 last year from a part-time job. He invested part of the money at a 10% annual rate of interest and the rest at 7%. If the total annual earnings were $780, how much money was invested at 7%?
A. $4000 B. $4500 C. $7000 D. $5000