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Whitepunk [10]
2 years ago
9

Mark and his brother David are fighting over a toy airplane while playing their yard. Mark grabs the plane and takes off running

at rate of 7.5 miles per hour. One minute after Mark starts running, David starts to chase him at rate of 9mph. How long will David to reach Mark and how far will they have run?
Mathematics
1 answer:
-BARSIC- [3]2 years ago
5 0
David will have 2.57 seconds to get to mark and it’s 50 meters
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The elevation E, in meters, above sea level at which the boiling point of a certain liquid is t degrees Celsius is given by the
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Answer:

E(119.5)= 730m

Step-by-step explanation:

Given

E(t)= 1200(120-t)+520(120-t)^2

Required

Determine E(119.5)

E(t)= 1200(120-t)+520(120-t)^2

Simply substitute 119.5 for t

E(119.5)= 1200(120-119.5)+520(120-119.5)^2

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E(119.5)= 1200(0.5)+520(0.5)^2

Solve 0.5²

E(119.5)= 1200 * 0.5+520*0.25

E(119.5)= 600+130

E(119.5)= 730

Hence;

E(119.5)= 730m

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3 0
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Step-by-step explanation:

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