The mean weight of a group of boys is 165 lb, with a standard deviation of 20 lb. If the weights are normally distributed, find the probability that one of the boys picked at random from the group weighs between 150 and 195 lb. Round your answer to four decimal places.
?
A. 0.4332
B. 0.2734
C. 0.1598
D. 0.7066
E. 0.2934
Answer: D
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Provide an appropriate response.Suppose that you can invest $11,000 in a business that guarantees you the following cash flows: $5500 at the end of 2 years, $4500 at the end of 4 years, and $4000 at the end of 5 years. Assuming an interest rate of 6.25% compounded annually, find the net present value of the cash flows. Is the investment profitable?
Fill in the blank(s) with the appropriate word(s).
Solve.A company has 63,000 employees. Of these, 
drive alone to work, 
car pool, 
use public transportation, 
cycle, and the remainder use other methods of transportation. How many employees use each method of transportation?
A. Drive alone: 2,100; car pool: 10,500; public transportation: 9,000; cycle: 7,000; 
B. Drive alone: 21,000; car pool: 10,500; public transportation: 9,000; cycle: 7,000; 
C. Drive alone: 21,100; car pool: 10,500; public transportation: 8,900; cycle: 7,000; other: 1000
D. Drive alone: 21,000; car pool: 10,500; public transportation: 9,000; cycle: 7,000; 
Find the center and the vertices located on the major axis of the ellipse: 
a. Center: (0, 0); vertices: (–9, 0), (9, 0) b. Center: (0, 0); vertices: (0, –9), (0, 9) c. Center: (–9, 9); vertices: (–1, 0), (1, 0) d. Center: (0, 0); vertices: (–9, –1), (9, 1)
Factor, if possible.216x12 + 125y9
A. (6x4 - 5y3)(6x4 + 5y3) B. (6x4 + 5y3)(36x8 + 30x4y3 + 25y6) C. (6x4 + 5y3)(36x8 - 30x4y3 + 25y6) D. (6x4 - 5y3)(36x2 + 30x4y3 + 25y6b2)