Solve the problem.A customer purchased 3 bottles of nail polish for $2.60 each. How much does a salesperson earn on this sale if the rate of commission is 36%? Round to the nearest cent.
A. $0.94
B. $2.82
C. $28.08
D. $7.80
Answer: B
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Translate to a system of two equations, then solve.During a specific year, the percentage of high school sophomores that spent 13 hours or more each week preparing for class was 13% more than those that spent less than 13 hours preparing for class. If the percentage of both groups totals 100%, what percentage of high school sophomores spent 13 hours or more each week preparing for class?
A. 42.5% spent 13 hr or more, 57.5% spent less than 13 hr B. 57.5% spent 13 hr or more, 42.5% spent less than 13 hr C. 43.5% spent 13 hr or more, 56.5% spent less than 13 hr D. 56.5% spent 13 hr or more, 43.5% spent less than 13 hr
Write the decimal as a fraction in lowest terms.8.52
A. 
B. 
C. 
D. 
Use Gauss-Jordan elimination to solve the linear system and determine whether the system has a unique solution, no solution, or infinitely many solutions. If the system has infinitely many solutions, describe the solution as an ordered triple involving variable z.x + 8y + 8z=87x + 7y + z=18x + 15y + 9z=-9
A. (0, 0, 1) B. (-1, 0, 1) C. (1, -1, 1) D. no solution
The graph of a function f is given. Use the graph to answer the question.Find the numbers, if any, at which f has a local minimum. What are the local minima?
A. f has no local minimum B. f has a local minimum at x = -? and ?; the local minimum is -1 C. f has a local minimum at x = 0; the local minimum is 1 D. f has a local minimum at x = -?; the local minimum is -1