Solve.
= 8x7y
A. y = 8Cx8ex8
B. y = Cex8
C. y = 8Cx8ex7
D. y = 8Cx7ex7
Answer: B
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Solve the problem.The motion of a spring-mass system is described by the equation 
where y is the distance in feet from the equilibrium position and t is time in seconds. If the weight is 18 feet from the ceiling in a state of equilibrium, find the starting position of the weight 
A. 13 ft B. 5 ft C. 18 ft D. 36 ft
Solve the problem.When making a telephone call using a calling card, a call lasting 6 minutes cost $2.80. A call lasting 13 minutes cost $5.60. Let f(x) be the cost of making a call lasting x minutes using a calling card. Write a linear function that models the cost of making a call lasting x minutes.
A. f(x) = 0.4x + 0.4
B. f(x) = -0.4x + 5.2
C. f(x) = 
x - 
D. f(x) = 0.4x - 7.4
Solve the problem.The following bar graph shows the average annual income for single mothers.
i) Determine a linear function that can be used to estimate the average yearly income for single mothers from 1995 through 2000. Let t represent the number of years from 1995. (In other words, 1995 corresponds to t = 0, 1996 corresponds to t = 1, and so on.)ii) Using the function from part i, determine the average yearly income for single mothers in 1998.iii) Assuming this trend continues, determine the average yearly income for single mothers in 2010.iv) Assuming this trend continues, in which year will the average yearly income for single mothers reach
$33,000? A.
| i) | I(t) = 775.8t + 24,269 |
iii) $35,906.00
iv) 2006
B.
| i) | I(t) = 775.8t + 24,269 |
iii) $35,906.00
iv) 2007
C.
| i) | I(t) = 775.8t + 24,269 |
iii) $35,906.00
iv) 2006
D.
| i) | I(t) = 770.8t + 24,269 |
iii) $35,831.00
iv) 2006
Find the exact value. If the value of the function is not defined, write undefined.sec 900°
A. -1 B. 1 C. Undefined D. 0