Find the length of the curve.The curve r = a cos2 
, 0 ? ? ? ?, a > 0
A. 
B. 
C. 2a
D. 2?a
Answer: C
Mathematics
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Plot the parametric surface over the indicated domain.r(u, v) = 3cos vi + 4sin vj + uk; -7 ? u ? 7, 0 ? v ? 2?
A. 
B. 
C. 
D. 
Mathematics
Find the circumference of the circle. Use ? ? 3.14 and round to the nearest hundredth.diameter = 56 km
A. 175.84 km B. 87.92 km C. 351.68 km D. 9847.04 km
Mathematics
Provide an appropriate response.A student was asked to find ordered pairs that solve the system of equations x + 2y = 3 -2x - 4y = -6.The student claims that (1, 1) and (-1, 2) are the only solutions. Is the student correct?
A. Yes B. No
Mathematics
What part of the object or set of objects is shaded?
A. 
B. 
C. 
D. 
Mathematics