For a sample of size 
, proportion 
, and at a 95% confidence level, the lower bound of the proportion is _____.
A. 0.229
B. 0.121
C. 0.175
D. 0.414
Answer: A
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Solve the problem.Suppose that the population of a certain city during a certain time period can be modeled with the function, P(x) = -0.1x5 + 3.4x4 + 5000, where x is time in years since 1960. By sketching a graph of P(x), estimate during what time period the population of the city was increasing.
A. Between 1960 and 1974 B. Between 1965 and 1987 C. Between 1987 and 1994 D. Between 1960 and 1987
Solve the problem. Be sure to make a diagram of the situation with all the given information labeled. ? How long should an escalator be if it is to make an angle of 29° with the floor and carry people a vertical distance of 22 feet between floors? ?
A. 48 ft B. 40 ft C. 55 ft D. 45 ft E. 43 ft
Use the product rule to multiply. Assume all variables represent positive real numbers.
? 
A. 7
x
B. 14
C. 2
x
D. 14x
Solve the problem.How much will it cost to carpet a 25 ft by 15 ft room if carpeting costs $14.00 per square yard?
A. $437.50 B. $1750.00 C. $583.33 D. $5250.00