Solve the problem.One Internet service provider has the following rate schedule for high-speed Internet service:Monthly service charge$18.001st 50 hours of usefreeNext 50 hours of use$0.25/hourOver 100 hours of use$1.00/hourWhat is the charge for 50 hours of high-speed Internet use in one month?What is the charge for 75 hours of high-speed Internet use in one month?What is the charge for 135 hours of high-speed Internet use in one month?
Fill in the blank(s) with the appropriate word(s).
$18.00
$24.25
$65.50
Mathematics
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A. Hyperboloids of two sheets B. Ellipsoids C. Hyperboloids of one sheet D. Paraboloids
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Solve the problem.One digit from the number 3,565,885 is written on each of seven cards. What is the probability of drawing a card that shows 3, 5, or 6?
A. 
B. 
C. 
D. 
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Answer the question or complete the sentence to make a true statement.The sum of three negative numbers will always be a number.
A. Negative B. Positive
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Graph the solution set of the following system of inequalities and find the coordinates of points where any lines intersect.
A. 
B. 
C. 
D. 
Mathematics