Find an equation of variation in which the following are true.y varies directly as x and inversely as z, and y = 4 when x = 2 and z = 9.
A. y = 21xz
B. y = 
C. y = 
D. y = 
Answer: B
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A population changes with time. Its level after t years is given by the function 
. Over a certain period, the population is growing. What can be said about 
over this period?
?
A. is positive.
B. is negative.
C. is zero.
D. is linear.
Find the slope of the line.4y - 2x = 7 + 3y - 2x
A. 1 B. 7 C. 0 D. Undefined
Provide an appropriate response.Describe how an angle measure can be converted from radians to degrees.
A. Multiply the degree measure by 
.
B. Multiply the degree measure by 
.
C. Multiply the degree measure by 
.
D. Multiply the degree measure by 
.
Write the number as indicated.In 2003, a large corporation earned approximately $5,400,000,000. Write the number in words.
A. Five billion, four hundred thousand dollars B. Five billion, four million dollars C. Five billion, four hundred million dollars D. Five million, four thousand dollars