Use the square root property to solve the quadratic equation.x2 - 13 = 0
A. No real solution
B. 
C. ± 
D. ± 13
Answer: C
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Find any values of the variables that must be excluded.
A. z = 0 B. z = 6 C. z = -6 D. Defined for all real numbers
Solve the problem.Two phone companies compete for customers in a city. Company 1 retains 3/4 of its customers and loses 1/4 of its customers to Company 2. Company 2 retains 5/6 of its customers and loses 1/6 to Company 1. If we represent the fraction of the market held last year by 
, where a is the number the that Company 1 had last year and b is the number that Company 2 had last year, then the number that each company will have this year can be found by the following matrix equation. 
= 
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If Company 1 has A = 81,000 customers and Company 2 has B = 153,000 customers this year, then how many customers did Company 2 have last year?
A. 76,000 customers
B. 168,000 customers
C. 72,000 customers
D. 162,000 customers
Find the volume of the solid of revolution obtained by revolving the region bounded by the graphs of the given functions about the x-axis.
?
, 
, and 
?
Hint: You will need to evaluate two integrals.
What will be an ideal response?
Solve the problem using your calculator.The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test. What is the correlation coefficient?
A. 0.678 B. -0.224 C. -0.678 D. 0.224