Find the curvature ? for the given function.r(t) = 
(1 + t)3/2i + 
(1 - t)3/2j + 
tk
A. ? = 
B. ? = 
C. ? = 
D. ? = 
Answer: B
Mathematics
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Find the indicated probability.In a survey, 50 students were asked to name their favorite color. The table below shows the results. 
If a student is selected at random, what is the probability that their favorite color is purple?
A. 
B. 
C. 
D. 9
Mathematics
Add or subtract.24.61 + 89.48 + 38.431
A. 152.621 B. 152.521 C. 152.531 D. 153.521
Mathematics
Multiply.-2 ? (-3) ? (-9) ? 9 ? (-8)
A. -478 B. 3888 C. -13 D. -3888
Mathematics
The rearview mirror of a car measures 3.3 in high and has length 8.5 in. What is the area of the rear view mirror if the shape is a parallelogram?
A. 14 in. 2 B. 29 in. 2 C. 24 in. 2 D. 28 in. 2 E. 30 in. 2
Mathematics