Find the exact value of y, or state that y is undefined.y = sin-1 
A. 
B. 
C. 
D. - 
Answer: A
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Find the unit tangent vector T and the principal unit normal vector N. r(t) = 
(1 + t)3/2i + 
(1 - t)3/2j + 2tk
A. T = 
i - 
j + 
k; N = 
i + 
j
B. T = 
i + 
j + 
k; N = 
i + 
j
C. T = 
i - 
j + 
k; N = 
i + 
j
D. T = 4
i - 4
j + 2k; N = 3
i + 3
j
Find the area of the figure.A rectangle with side lengths of 17 in. and 11 in.
A. 748 in.2 B. 374 in.2 C. 13.7 in.2 D. 187 in.2
Simplify the expression.
-2/3
A. 
B. 
C. - 
D. Not a real number
Solve the problem.Sue drove her car 275 miles in January, 328 miles in February, and 253 miles in March. If her average mileage for the four months from January to April is to be at least 292 miles, how many miles must she drive in April?
A. at most 292 miles B. at most 312 miles C. at least 312 miles D. at least 287 miles