Solve the problem.Hooke's Law for an elastic spring states that the distance a spring stretches varies directly as the force applied. If a force of 25 pounds stretches a certain spring 
then how much will a force of 
stretch the spring?
A. 2 in.
B. 175 in.
C. 21 in.
D. 3 in.
Answer: C
Mathematics
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Determine whether the given function satisfies a Laplace equation.f(x, y, z) = cos (7x) sin (-7y) e(
z)
A. Yes B. No
Mathematics
Evaluate the integral using the given substitution.
, u = cot 5?
A. - 
tan2 5? + C
B. - 
cot2 5? + C
C. 
csc3 5? cot2 5? + C
D. 
cot2 ? + C
Mathematics
Find an equation of variation in which the following are true.y varies directly as x and inversely as z, and y = 10 when x = 2 and z = 4.
A. y = 
B. y = 23xz
C. y = 
D. y = 
Mathematics
Find the mode or modes for the list of numbers.The weights of cross-country runners (in pounds): 125, 141, 156, 125, 188, 199, 162
A. 156 pounds B. 91 pounds C. 125 pounds D. 141 pounds
Mathematics