Solve the problem.At a private arts and science academy, in addition to tuition, the school charges for lab fees and supplies as shown in the table below.
Let f(n) be the per-student charge (in dollars) for lab fees and supplies for nth grade; kindergarten is represented by 
A model for this situation is 
Estimate for what grade the per-student charge for lab fees and supplies is $21.
A. 4th grade
B. 1st grade
C. 2nd grade
D. 3rd grade
Answer: D
Mathematics
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Indicate whether the given series converges or diverges. If it converges, find its sum.
A. Converges; 
B. Converges; e4
C. Converges; 
D. Diverges
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Next year's value of quantity 1 is obtained by multiplying this year's value of quantity 1 by 1.13. Next year's value of quantity 2 is obtained by adding 1.13 to this year's value of quantity 1. Which of the two quantities are growing exponentially? ?
A. Only quantity 1 B. Only quantity 2 C. Both quantity 1 and quantity 2 D. Neither quantity 1 nor quantity 2
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Solve the quadratic equation by completing the square.7x2 + 9x + 7 = 0
A. 
B. 
C. 
D. 
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Use the graph to evaluate the limit.
f(x)
A. does not exist B. -1 C. 1 D. ?
Mathematics