Use a calculator to find the approximate value of the expression. Round the answer to two decimal places.cot 0.2774
A. 0.96
B. 0.28
C. 1.04
D. 3.51
Answer: D
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Find the solution set for each inequality. Graph the solution set on a number line and write it in interval notation.|x| - 9 ? -6
A. (-?, -15]
B. [-3, 3]
C. (-?, -3] ? [3, ?)
D. (-?, 3]
Solve the problem.Find the centroid of a hemispherical shell having outer radius 6 and inner radius 4 if the density varies as the square of the distance from the base.
A. 
= 0, 
= 0, 
= 
B. 
= 0, 
= 0, 
= 
C. 
= 0, 
= 0, 
= 
D. 
= 0, 
= 0, 
= 
Find the exact value. Do not use a calculator.cos 0
A. 1
B. 
C. 0
D. undefined
Multiply the polynomials using the special product formulas. Express the answer as a single polynomial in standard form.(x - 3)3
A. x3 - 9x2 + 27x - 27 B. x3 - 9x2 + 9x - 27 C. x3 - 9x2 + 15x - 27 D. x3 - 3x2 + 15x - 27