Solve the problem.It took 1950 J of work to stretch a spring from its natural length of 1 m to a length of 
. Find the spring's force constant.
A. 1462.5 N/m
B. 487.5 N/m
C. 3900 N/m
D. 975 N/m
Answer: D
Mathematics
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Evaluate the integral.
A. 23x sin 
x - 46 cos 
x + C
B. 92 sin 
x - 46x cos 
x + C
C. 23 sin 
x + 46x cos 
x + C
D. 46x sin 
x + 92 cos 
x + C
Mathematics
Multiply or divide the fractions. Reduce to simplest form.
? 
A. 
B. 
C. 
D. 
Mathematics
Simplify the radical. Indicate if the radical is not a real number. Assume that x represents a positive real number.
A. 22 B. 242 C. -22 D. Not a real number
Mathematics
Perform the indicated operation. Simplify the result, if possible.
÷ 
A. 
B. 
C. 
D. 
Mathematics