Solve the problem.In the following formula, y is the minimum number of hours of studying required to attain a test score of x: y = 
. How many hours of study are needed to score 90? Round to the nearest hundredth of an hour.
A. 101.12 hr
B. 2.91 hr
C. 29.10 hr
D. 7.86 hr
Answer: B
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Solve the problem.A political poll has a built in error tolerance. A candidate receiving 41% support, according to the poll, could actually have 43% support and the poll would still be considered accurate. The error tolerance for the candidate with 41% support is 3%. An acceptable percentage p for the candidate must satisfy the inequality 
? 3. Solve the inequality and interpret the result.
A. {p
};Actual support for the candidate could vary between -3% and 3%.
B. {p
}; Actual support for the candidate will not vary because you cannot have negative percentages.
C. {p
}; Actual support for the candidate could vary between 41% and 44%.
D. {p
}; Actual support for the candidate could vary between 
and 44%.
Write the expression in lowest terms.
A. -r + s B. r + s C. -r - s D. -1
Provide an appropriate response.Tell whether the statement is true or false. If it is false, give the correct answer. Explain your answer. The easiest way to simplify the expression 
is to multiply both the numerator and denominator by 10 - 
What will be an ideal response?
Solve the problem.The formula P = 14.7e-0.21x gives the average atmospheric pressure, P, in pounds per square inch, at an altitude x, in miles above sea level. Find the average atmospheric pressure for an altitude of 2.3 miles. Round your answer to the nearest tenth.
A. 9.1 lb/in.2 B. 7.8 lb/in.2 C. 8.4 lb/in.2 D. 11.0 lb/in.2