Solve the problem.Doctors predict that by administering a vaccine, the number of new cases of a certain childhood disease will decrease by half each year. If 600 people were afflicted with the disease in 2017, estimate the number of new cases in 2022. (Round to the nearest whole number, if necessary.)
A. 38 new cases in 2022
B. 19 new cases in 2022
C. 75 new cases in 2022
D. 9 new cases in 2022
Answer: B
Mathematics
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Simplify the expression. Assume all variables represent positive real numbers.
A. x 
B. 
C. 
D. x 
Mathematics
Solve the problem.How much interest will have to be paid on a loan of $50,423 for 18 months at a simple interest rate of 12.2% per year?
A. $9740.04 B. $9304.95 C. $9227.41 D. $8714.78
Mathematics
Graph the solution set on a number line.{x|-4 < x < 0}
A. 
B. 
C. 
D. 
Mathematics
Determine whether the pair of lines is parallel, perpendicular, or neither.y - 1 = - xy - x = 1
A. Parallel B. Perpendicular C. Neither
Mathematics