Find the center and the radius of the circle.x2 + y2 - 4x - 6y + 13 = 4
A. (3, 2); r = 2
B. (-3, -2); r = 4
C. (-2, -3); r = 4
D. (2, 3); r = 2
Answer: D
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Solve the problem.Ken is 6 feet tall and is walking away from a streetlight. The streetlight has its light bulb 14 feet above the ground, and Ken is walking at the rate of 1.3 feet per second. Find a function, d(t), which gives the distance Ken is from the streetlight in terms of time. Find a function, 
, which gives the length of Ken's shadow in terms of d. Then find 
.
A. (S ? d)(t) = 0.72t B. (S ? d)(t) = 2.2t C. (S ? d)(t) = 1.24t D. (S ? d)(t) = 0.98t
Use a calculator to approximate the circular function value (rounded as indicated).sec 0.1232
(Round to three decimal places.)
A. 0.1238 B. 1.008 C. 0.1229 D. 0.9924
Find the quotient using long division.
A. x2 - 5 B. x + 5 C. x + 25 D. x - 25
Find the exact value of the expression. Do not use a calculator.sec ?, if cos ? = 
and sin ? > 0
A. 2
B. - 2
C. 
D. 