?Which of the following is not equivalent to a velocity of -450 feet?
?
A. ?A speed of 450 feet downward
B. ?A velocity of -450 feet
C. ?A velocity of 450 feet
D. ?A velocity of 450 feet back in time
E. ?c and d
Answer: E
Mathematics
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Find the derivative.
A. 
B. 
C. 
D. 
Mathematics
Find the equation of the indicated least-squares curve. Sketch the curve and plot the data points on the same graph.For the points on the following table, find the least-squares curve y = mx2 + b.
A. y = 4.14x2 + 1
B. y = 1.07x2 - 0.76
C. y = 2.14x2 - 1.52
D. y = 3.5x2 + 5.9
Mathematics
Convert. When necessary, round the answer to two decimal places.11.5 minutes = seconds
A. 1150 B. 230 C. 690 D. 57.5
Mathematics
Use the substitution method to solve the system.
x + 
y = -8
x - 4y = 14
A. (2, -8) B. (-4, -4) C. (2, -6) D. (-4, 14)
Mathematics