Solve the problem.A rumor is spread at an elementary school with 1200 students according to the model 
where N is the number of students who have heard the rumor and d is the number of days that have elapsed since the rumor began. How many students will have heard the rumor after 5 days?
A. 689 students
B. 1006 students
C. 1063 students
D. 661 students
Answer: D
Mathematics
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xy - 5yz + 7x - 35z
A. (y + 5)(x - 7z) B. (y + 7)(x - 5z) C. (y - 7)(x + 5z) D. (y - 5)(x + 7z)
Mathematics
Solve. Round to the nearest percent if necessary.Enrollment in a class at a local college increased from 140 to 168. What was the percent of increase?
A. 17% B. 20% C. 120% D. 28%
Mathematics
The letters r and ? represent polar coordinates. Write the equation using rectangular coordinates (x, y).r = 10 sin ?
A. 
= 10y
B. x2 + y2 = 10y
C. x2 + y2 = 10x
D. 
= 10x
Mathematics
Find the least common multiple of the given polynomials.x2- 9x+ 20, 2x- 8
A. 2(x + 5)(x + 4) B. 2(x - 5)(x + 4) C. 2(x + 5)(x - 4) D. 2(x - 5)(x - 4)
Mathematics