The cumulative number F of flu cases reported after t weeks is modeled by the function
.
How many people had the flu at the start of the epidemic? Round your answer to the nearest whole number.
?
A. 
B. 
C. 
D. 
Answer: C
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Solve the problem.Suppose a plumber charges $160 for the first hour plus $70 for each additional hour. Write an expression for the cost (in dollars) of a job lasting n hours.
A. 230n B. 160 + 70n C. 160 ? 70n-1 D. 160 + 70(n - 1)
Provide an appropriate response.Write an expression that represents the area of the rectangle. Simplify the expression.
A. (13x - 48) sq m B. (40x - 48) sq m C. (40x + 48) sq m D. (13x - 14) sq m
Find the vertices of the ellipse.36(x + 2)2 + 16(y - 3)2 = 576
A. (-1, 9), (-1, -3)
B. (2, 9), (2, -3)
C. (-2, 3 - 2
), (-2, 3 + 2
)
D. (-2, 9), (-2, -3)
Solve the problem.Regrind, Inc. regrinds used typewriter platens. The variable cost to regrind each platen is $1.90. The total cost to regrind 100 platens is 
Find the linear cost function to regrind platens. If reground platens sell for 
each, how many must be reground and sold to break even?
A. C(x) = 1.90x + 300; 45 platens B. C(x) = 1.90x + 110; 11 platens C. C(x) = 1.90x + 110; 17 platens D. C(x) = 1.90x + 300; 29 platens