Solve the problem.How long will it take for prices in the economy to double at a 7% annual inflation rate?
A. 16.24 yr
B. 9.01 yr
C. 10.24 yr
D. 23.45 yr
Answer: C
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Solve the problem.Assume that a watermelon dropped from a tall building falls 
in t sec. Find the watermelon's average speed during the first 4 sec of fall and the speed at the instant 
A. 65 ft/sec; 130 ft/sec B. 128 ft/sec; 65 ft/sec C. 64 ft/sec; 128 ft/sec D. 32 ft/sec; 64 ft/sec
Determine a general formula (or formulas) for the solution to the equation.sin ? csc ? = -2 sin ?
A. ? = 
+ n? or ? = 
+ n? or ? = n?
B. ? = 
+ 2n? or ? = 
+ 2n? or ? = n?
C. ? = 
+ n? or ? = 
+ n? or ? = n?
D. ? = 
+ 2n? or ? = 
+ 2n? or ? = n?
Solve the problem.A drug company is running trials on a new test for anabolic steroids. The company uses the test on 400 athletes know to be suing steroids and 200 athletes known not to be using steroids. Of those using steroids, the new test is positive for 390 and negative for 10. Of those not using steroids, the test is positive for 10 and negative for 190. What is the estimated probability of a false negative result (the probability that an athlete using steroids will test negative)?
A. 0.05 B. 0.975 C. 0.025 D. 0.95
Let H be the hyperplane through the points. Find a linear functional f and a real number d such that 
, 
A. f(x1, x2) = 3x1 - 4x2, d = -15 B. f(x1, x2) = -7x1 + 4x2, d = 19 C. f(x1, x2) = -x1 + 3x2, d = 10 D. f(x1, x2) = 7x1 + 4x2, d = 5