Find the center and radius of the circle.(x + 7)2 + (y + 6)2 = 81
A. (-6, -7); 81
B. (7, 6); 9
C. (-7, -6); 9
D. (6, 7); 81
Answer: C
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The speed of sound in air changes with temperature. When the temperature is 39 degrees Fahrenheit, the speed of sound is 1095.2 feet per second. For each degree increase in temperature, the speed of sound increases by 1.1 feet per second.
?
A: Explain why the speed 
, in feet per second, is a linear function of the temperature 
, in degrees Fahrenheit.
?
B: Use a formula to express 
as a linear function of 
.
?
C: What temperature corresponds to a speed of sound of 1143.2 feet per second?
What will be an ideal response?
Solve the problem.Evaluate 
A. 
B. 
C. 
D. 
Write as a percent.
A. 74.6% B. 7.46% C. 746% D. 0.746%
Use Euler's formula to answer the question.A polyhedra has 36 edges and 20 faces. How many vertices does it have?
A. 18 B. 54 C. 15 D. 56