Solve the problem.During one year 10 new employees began work at Daniel's Manufacturing Company and 18 employees left. At the beginning of the year there were 297 employees. What was the number of employees at the end of the year?
A. 325 employees
B. 307 employees
C. 269 employees
D. 289 employees
Answer: D
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Find the coordinates of the vertex of the quadratic function.f(x) = -x2 - 2x + 6
A. (-1, 7) B. (1, 5) C. (-2, 6) D. (1, 3)
A water pipe is to be installed on the diagonal of a lot which is 15. 80 m by 100 m. To the nearest tenth of a meter, how much pipe will be required?
(a) 111.7 m (b) 90 m (c) 128.1 m (d) 132.4 m
Solve the problem.Economists use what is called a Leffer curve to predict the government revenue for tax rates from 0% to 100%. Economists agree that the end points of the curve generate 0 revenue, but disagree on the tax rate that produces the maximum revenue. Suppose an economist produces this rational function 
where R is revenue in millions at a tax rate of x percent. Use a graphing calculator to graph the function. What tax rate produces the maximum revenue? What is the maximum revenue?
A. 35.8%; $276 million B. 34.0%; $271 million C. 41.2%; $264 million D. 36.6%; $268 million
Solve the problem.The velocity of a car is 94 sin t - 55 kilometers per hour on the time interval [0, 2] hours. Assuming that the odometer runs backward when the car has negative velocity, express the odometer reading at the end of the time interval in terms of its reading at the beginning, R0.
A. 30.053 + R0 B. 188 + R0 C. 243.118 + R0 D. 23.118 + R0