Find the domain of the vector-valued function. r(t) = sin 4t i + e
j
A. t > 4
B. All real numbers
C. t ? 
D. t ? 0
Answer: D
Mathematics
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Calculate the area of the surface S.S is the cap cut from the paraboloid z = 
- 9x2 - 9y2 by the cone z = 
.
A. 
B. 
C. 
D. 
Mathematics
Round to the indicated place value.Round to the nearest hundred: 159.716
A. 160 B. 200 C. 100
Mathematics
Solve the system by substitution. x + 4y = -10 9x + 3y = 9
A. (2, -3) B. (-2, -2) C. (1, -2) D. No solution
Mathematics
Add or subtract, if possible. Assume that all variables represent non-negative values. Simplify your answer. 6
- 3
- 
A. 15x
B. 14x
C. 2x
D. 3x
Mathematics