Find the exact value of the expression, if possible. Do not use a calculator.cos (cos-1 0.5)
A. 0.9
B. 0.5
C. 2.6
D. 3.6
Answer: B
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Find the volume of the described solid.The solid lies between planes perpendicular to the x-axis at x = - 4 and x = 4. The cross sections perpendicular to the x-axis are semicircles whose diameters run from 
to 
A. 
?
B. 
?
C. 
?
D. 
?
Solve.The number of employees that work at a company has increased by 35% over the past year. This year there are 763 more employees with the company than last year. How many employees were there last year?
A. 2180 employees B. 21.8 employees C. 1417 employees D. 26,705 employees
Subtract.-93 - 95
A. -2 B. -188 C. 188 D. 2
For the functions f(x) and g(x), determine the domain of (f + g)(x) (the sum of f and g).f(x) = 
, g(x) = 
A. {x ? x is a real number and x ? 3 and x ? 8} B. {x ? x is a real number and x ? -3 and x ? -8} C. {x ? x is a real number and x ? 3} D. {x ? x is a real number}