Construct a 95% confidence interval for the population mean using the given information.New medication's effect on total serum cholesterol level of all patients (drop in total cholesterol), 
E = 3.1 mg/dL
A. 7.5 < ? < 13.7
B. 7.6 < ? < 13.6
C. 7.4 < ? < 13.9
D. 7.6 < ? < 13.8
Answer: A
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Solve the problem.Bobby built a house of cards 15 ft 1 in. tall. Pam built a house of cards 
tall. How much taller is Bobby's house of cards than Pam's?
A. 1 ft 7 in. B. 2 ft 8 in. C. 1 ft 5 in. D. 1 ft 6 in.
Perform the indicated operation and express with the proper accuracy and precision. The first number given is approximate and the second number is exact. (Use calculator if needed).0.3073 + 19.7
A. 20.0073 B. 20 C. 20.01 D. 20.0
Express the number in exponential form.66.75(cos 320.01° + j sin 320.01° )
A. 66.75e320.01j B. 66.75e5.585j C. 5.585e66.75j D. 320.01e66.75j
Find a1, r, an, n, or Sn for the geometric sequence, as instructed.a1 = 1280, r = 
, an = 80; Find n.
A. 3 B. 2 C. 5 D. 4