Solve the rational inequality and graph the solution set on a real number line. Express the solution set in interval notation.
< 1
A. (-?, 5)
B. (-?, 5) or (7, ?)
C. (5, 7)
D. (-?, 5] or [7, ?)
Answer: B
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Find the number of gallons of sulfuric acid in 90 gallons of solution in a tank, if the percent of sulfuric acid is 50%.
A. 45 gal B. 4.5 gal C. 9 gal D. 18 gal E. 90 gal
Solve the problem.Scores on a test are approximately normally distributed with a mean of 70 and a standard deviation of 9. The teacher wants to give A's to the top 10% of students and B's to the next 23%. What is the bottom cutoff for a B grade? Round your answer to the nearest whole number.
A. 66 B. 76 C. 74 D. 71
Solve the problem.Evaluate 
at t = 9 for the function w = exyz2; x = t, y = t, z = 
.
A. 
e
B. - 
e
C. 0
D. 
For the compound inequality, give the solution set in both interval and graph forms.-2b + 4 < 10 or -2b + 4 ? 18
A. (3, 7]
B. (-?, -7] ? (-3, ?)
C. [-7, ?)
D. (-?, -3)