Solve the combination exercise.From 9 names on a ballot, a committee of 3 will be elected to attend a political national convention. How many different committees are possible?
A. 60,480
B. 84
C. 252
D. 504
Answer: B
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Determine whether the given function satisfies Laplace's equation.f(x, y) = e-3y sin -3x
A. Yes B. No
Provide an appropriate response.If f(x0, y0) = -2 and the limit of f(x, y) exists as (x,y) approaches (x0, y0), what can you say about the continuity of 
at the point 
Give reasons for your answer.
What will be an ideal response?
Solve the problem.A rectangle has area A m2 with A = w(8 - w), where w is the width of the rectangle and the perimeter is 16m. Sketch the graph of A as a function of w.
A. 
B. 
C. 
D. 
Use the sum-of-the-years'-digits method of depreciation. Round to the nearest dollar.Scot Cleaners bought a new trouser press for $7,500 and estimates its life at 4 years at which time the salvage value is expected to be $750. Find the amount of depreciation each year.
A. $3,000, $2,250, $1,500, $750 B. $1,688, $1,688, $1,688, $1,688 C. $3,750, $1,875, $938, $188 D. $2,700, $2,025, $1,350, $675