Answer:
$17.50
Step-by-step explanation:
THATS THE TOTAL THE SALES TAX WOULD BE $0.75
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8.48 multiplied by 10 to the power of one
5^-3 = 1/125
-5^-3 = -1/125
(-5^-3)^-1 = -125
(-5^-3)^0 = 1

Actually Welcome to the concept of straight lines.
==> y-y1 = m(x-x1)
==> y = mx+c
these two are the straight line equation, so we get as,
=> 0-0 = m(8-(-7)
==> 0 = m(15)
==> hence, 15m = 0
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