Solve the problem.The cost, in dollars, of cellular phone service with Econo-phone is given by 
where x is the number of minutes used in one month. Find the slope and y-intercept of the equation and explain what each signifies.
A. 26.55 signifies the total phone bill, and 0.19 signifies the number of minutes used.
B. 26.55 signifies the cost per minute, and 0.19 signifies the monthly service charge.
C. 0.19 signifies the hourly phone rent, and 26.55 signifies the cost of the hardware.
D. 0.19 signifies the cost per minute, and 26.55 signifies the monthly service charge.
Answer: D
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Provide an appropriate response.
A V-slot forms a triangle whose angle at the vertex is 60°. The depth of the slot is 24 mm. Find the width of the V-slot. 
A. 12 mm B. 24 mm C. 13.9 mm D. 27.7 mm
Solve.4t3 - 25t = 0
A. 0
B. ± 
C. - 
, 
, 0
D. 
Perform the indicated operation.909 ? 13
A. 11,817 B. 11,808 C. 11,826 D. 1287
Solve the problem.A stack of poles has 36 poles in the bottom row, 35 poles in the next row, and so on, with 10 poles in the top row. How many poles are there in the stack?
A. 555 B. 611 C. 631 D. 621