Solve the problem.The tables below show the times by three runners in two heats of a race. Write a matrix that shows the increase (decrease) in each time from the first heat to the second. 
A. 
B. 
C. 
D. 
Answer: D
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Test the equation for symmetry with respect to the x-axis, the y-axis, and the origin.y = 3x4 + 3x - 7
A. no symmetry B. x-axis only C. x-axis, origin D. origin only
Solve the problem.A Company sold 14.7 million dollars of electronics equipment in 2010 and its sales have increased by 2.1 million dollars each year. Company B sold 19.4 million dollars of electronic equipment in 2010 and its sales have increased by 1.7 million dollars each year.i) Let A(t) and B(t) represent the sales (in millions of dollars) by company A and company B, respectively, at 
since 2010. Find equations for A and B.ii) Predict when sales at the companies will be equal. What will that sales be?
What will be an ideal response?
Find the domain of the expression.
A. {
p ? -4}
B. (-?, ?)
C. {
p ? 4}
D. {
p ? 6}
Solve the problem.A farmer's silo is the shape of a cylinder with a hemisphere as the roof. If the radius of the hemisphere is 10 feet and the height of the silo is h feet, express the volume of the silo as a function of h.
A. V(h) = 100 ?h + 
?h2
B. V(h) = 100 ?(h - 10) + 
?
C. V(h) = 4100 ?(h - 10) + 
?
D. V(h) = 100 ?(h2 - 10) + 
?