Solve the problem.The length of a British nautical mile varies with latitude, according to the formula 
where x is the latitude in radians and L is in feet. Find the average length of a nautical mile for latitudes between ?/4 radians and ?/2 radians.
A. 6066 ft
B. 9536 ft
C. 4768 ft
D. 18,268 ft
Answer: A
Mathematics
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Evaluate the spherical coordinate integral.
A. 
?
B. 
?
C. 
?
D. 
?
Mathematics
Solve the problem.If x varies inversely as v, and x = 6 when v = 3, find x when v = 9.
A. x = 6 B. x = 3 C. x = 2 D. x = 9
Mathematics
Find an expression for dy/dx.y = (u + 8)(u - 8) and u = x2 + 9
A. 4x(x2 + 9) B. 2(x2 + 9) C. 4x(x2 + 9)2 D. 2(x2 + 9) + 2x
Mathematics
Simplify the expression. Write the result using positive exponents only.
-4
A. 
B. 
C. -81
D. 81
Mathematics