Write the number in simplest form, without a negative radicand.- 
A. -7i
B. -7
C. 7
D. 7i
Answer: A
Mathematics
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Evaluate the integral which is given in cylindrical or spherical coordinates.
A. 
?
B. 
?
C. 
?
D. 
?
Mathematics
Show that the function is a solution of the wave equation.w(x, t) = cos (5t - 5cx), c ? 1
A. Yes B. No
Mathematics
Write the word phrase as an algebraic expression. Use x to represent the unknown number.20 less than 4
A. 4 + 20 B. 4 - 20 C. 20 - 4 D. 20 ? 4
Mathematics
Solve the problem.Wind speed varies in the first twenty meters above the ground. For a particular day, let 
model the wind speed 
above the ground. What is the wind speed 
above the ground? Round results to the nearest hundredth.
A. 10.58 meters per second B. -6.00 meters per second C. 11.00 meters per second D. 11.07 meters per second
Mathematics