Solve the problem.Enrollment in a business seminar increased from 67 people to 86 people. What was the percent of increase?
A. 77.9%
B. 22.1%
C. 71.6%
D. 28.4%
Answer: D
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Solve the problem.Raul, who is 1.66 m tall, wishes to find the height of a tree with a shadow 32.51 m long. He walks 21.48 m from the base of the tree along the shadow of the tree until his head is in a position where the tip of his shadow exactly overlaps the end of the tree top's shadow. How tall is the tree? Round to the nearest hundredth.
A. 2.76 m B. 4.89 m C. 1.66 m D. 2.51 m
Solve the problems.The First Nations Bank pays 3
% interest per year on growth fund accounts. What is the annual income on a growth fund account of 
Round to the nearest dollar.
A. $2,242 B. $1,966,667 C. $22,420 D. $196,667
Perform the indicated operations. Simplify the answer.
? 
A. -16 B. 4i C. 4 D. 16i
Sketch the surface z = f(x,y).f(x, y) = 2 -x2 - y2
A. 
B. 
C. 
D. 