Solve.The area of a circle is 36? square meters. Find its radius.
A. 18 m
B. 6 m
C. 5 m
D. 12 m
Answer: B
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Answer the questionWhat type of variation is suggested by the graph?
A. y varies directly as the square of x B. y varies inversely as x C. y varies inversely as the square of x D. y varies directly as x
At one high school, students can run the 100-yard dash in an average of 15.2 seconds with a standard deviation of .9 seconds. The times are very closely approximated by a normal curve. Find the percent of times that are indicated. Round to the nearest whole percent.Between 14.3 and 16.1 seconds
A. 34% B. 50% C. 48% D. 68%
Determine the vertex, focus, and directrix of the parabola and sketch its graph.x2 = 16y
A. vertex: (0, 0)
focus: 
directrix: y = - 
B. vertex: (0, 0)
focus: 
directrix: y = 
C. vertex: (0, 0)
focus: 
directrix: y = - 4
D. vertex: (0, 0)
focus: 
directrix: x = 4
Find the present value P0 of the amount P due t years in the future and invested at interest rate k, compounded continuously.P = $10,000, t = 10 yr, k = 9%
A. $4106.46 B. $24,596.03 C. $9139.31 D. $4065.70