At lunchtime, a man called his wife from his office to tell her that they needed to switch vehicles so that he could use the family van to pick up some building materials after work. The wife then left their home, traveling towards his office in their van at 32 mph. At the same time, the husband left his office in his car, traveling towards their home at 47 mph.If his office is 47.4 miles from their home, how long will it take them to meet so that they can switch vehicles?
A. 0.3 hr
B. 1.1 hr
C. 0.6 hr
D. 1.6 hr
E. 2.6 hr
Answer: C
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150 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with mean ? = 65 and standard deviation ? = 10.The average score on the exam was approximately
A. 65. B. 75. C. 50. D. 10. E. none of these
Provide an appropriate response.If f(x) = 5 - x and g(x) = 2x2 - 3x + 4, find:(a)(f + g)(x)(b)(f - g)(x)(c)(f - g)(2)(d)(fg)(x)(e)(fg)(0)(f)
(x)(g)f(g(x))(h)g(f(x))(i)g(f(1))
What will be an ideal response?
Simplify the expression, leaving your answer with only positive exponents. Assume that all variables represent positive numbers.
A. x
B. x1/2
C. 
D. x9/8
Use a combination of rules for exponents to simplify. Write answers with only positive exponents. Assume that all variables represent nonzero real numbers.
A. 
B. 
C. 
D. 