Solve.A salesperson earned $350 a week plus a bonus of $25 for each service contract sold. If the pay one week was $525 how many service contracts were sold?
A. 3 contracts
B. 7 contracts
C. 4 contracts
D. 14 contracts
Answer: B
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Solve the problem.The rate at which an assembly line worker's efficiency E (expressed as a percent) changes with respect to time t is given by 
where t is the number of hours since the worker's shift began. Assuming that 
find E(t).
A. E(t) = 55t - 2t2 + 141 B. E(t) = 55t - 2t2 + 35 C. E(t) = 55t - 4t2 + 35 D. E(t) = 55t - 2t2 + 88
Simplify. Combine like terms if possible.-4y2 - (-7y2)
A. 3y2 B. Not like terms C. -11y2 D. -3y2
Use a half-angle formula to find the exact value of the expression.cos 
A. 
B. - 
C. - 
D. 
Find the amount by which the ordinary interest is larger than the exact interest. Round to the nearest cent.$51,100 at 11% for 220 days
A. $3435.06 B. $47.06 C. $57.56 D. $37.56