Solve the problem.In the following formula, y is the minimum number of hours of studying required to attain a test score of x: 
. How many hours of study are needed to score 89?
A. 41.00 hr
B. 4.1 hr
C. 100.90 hr
D. 7.16 hr
Answer: B
Mathematics
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Choose the equation that matches the graph.
A. -6x2 = y B. y2 = -6x C. x2 = -6y D. x2 = 6y
Mathematics
Solve problems using a calculator.The revenue of a construction company for the year is $6,682,957, and the total expenses are $5,995,974. Find the difference, or profit, for that year.
A. $686,985 B. $686,938 C. $686,984 D. $686,983
Mathematics
Use the Trapezoidal Rule with n = 4 steps to estimate the integral.
A. -1 - 
B. - 
C. - 
D. - 
Mathematics
Write as an addition problem and find the sum.Jane lost 9 pounds the first week and gained 2 pounds the second week. What was her net gain or loss?
A. -9 + 2 = -7 pounds B. -9 + 2 = 7 pounds C. 9 + (-2) = -11 pounds D. 9 + (-2) = 11 pounds
Mathematics