Graph the linear equation.x = -4
A. 
B. 
C. 
D. 
Answer: C
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Solve the problem.Under certain conditions the wind speed S, in miles per hour, of a tornado at a distance d from its center can be approximated by the function 
where a is an atmospheric constant, and V is the approximate volume of the tornado, in cubic feet. Assume that a is 0.78. Find 
.
A. 
B. - 
C. 
D. 
What is the equation of this graph?
Solve the problem.A company has sales (measured in millions of dollars) of 50, 60, and 75 during the first three consecutive years. Find a quadratic function that fits these data, and use the result to predict the sales during the fourth year. Assume that the quadratic function is of the form y = ax2 + bx + c
A. y = 5x2 + 5x + 40; sales during the fourth year = $180 million
B. y = 
x2 - 
x + 
; sales during the fourth year = $151.25 million
C. y = -5x2 + 40x + 15; sales during the fourth year = $95 million
D. y = 
x2 + 
x + 45; sales during the fourth year = $95 million
An investment firm wants to contact teachers that are in the top 1% of the wage earners. The average teacher salary is $40,000 and the standard deviation is $4,000. What wage does a teacher need to earn before the investment firm will contact?