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babunello [35]
3 years ago
13

ZAck bought a coat for $69.78. He paid with a $100.00 bill and received $26.73 in change. How much was the sales tax?

Mathematics
1 answer:
hoa [83]3 years ago
4 0
Steps
1)100-(69.78+26.73)=3.29
2)3.49= the money on tax
3)x=tax
69.78x=3.29
x=0.05
the sales tax is 5%
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A ball is thrown straight up from the top of a building 124 ft tall with an initial velocity of 64 ft per second. The height s(t
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Answer:

246 ft is the maximum height

Step-by-step explanation:

The height h given above is a quadratic function. The graph of h as a function of time t gives a parabolic shape and the maximum height h occur at the vertex of the parabola. For a quadratic function of the form h = a t² + bt + c, the vertex is located at t = - b / 2a. Hence for h given above the vertex in the question s(t) = 124 + 64t − 16t², is at t

t = -64/2(-16) = 64/32 = 2 seconds

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