Solve.As part of a charity bike-a-thon, friends have pledged Randall certain amounts of money per each mile that he bikes. To estimate how much money he will earn for the charity, he uses the formula 
where A is the amount in dollars of pledges earned and m is the number of miles Randall rides. Graph the equation for m = 0, 20, 40, and 60.
A. 
B. 
C. 
D. 
Answer: A
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Find the absolute value.|-19|
A. 19 B. 38 C. -19 D. 0
Provide an appropriate response.A group of astronomers detected a radio signal that originated approximately 
light years from Earth. Write 4.474 × 105 in standard form.
A. 447,400 B. 4,474,000 C. 223.7 D. 44,740
Solve the problem.The charges for renting a moving van are $65 for the first 30 miles and $8 for each additional mile. Assume that a fraction of a mile is rounded up. (i) Determine the cost of driving the van 99 miles. (ii) Find a symbolic representation for a function f that computes the cost of driving the van x miles, where 
(Hint: express f as a piecewise-constant function.)
A. $1097;
f(x) = 
B. $617;
f(x) = 
C. $6987;
f(x) = 
Solve the equation. Express radicals in simplest form.4x2 + 4x + 4 = 0
A. 
B. ?
C. 
D. {5, 4}