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IrinaVladis [17]
3 years ago
13

A plane flies 1140miles at a speed of 240mph. how long does it take? :)

Mathematics
2 answers:
olchik [2.2K]3 years ago
3 0
1140/240 =  4.75 hours
alexgriva [62]3 years ago
3 0
The speed is the ration of the distance to time

speed=240 m/h
distance=1140 mile

so the time elapsed= distance ÷ speed = 1140 / 240 = 4.75 hours
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Step-by-step explanation:

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Find dx/dt when y=2 and dy/dt=1, given that x^4=8y^5-240<br><br> dx/dt=
katrin2010 [14]

Answer:

The value of \frac{dx}{dt} is \frac{160}{x^3}.

Step-by-step explanation:

The given equation is

x^4=8y^5-240

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Differentiate with respect to t.

4x^3\frac{dx}{dt}=8(5y^4)\frac{dy}{dt}-0              [\because \frac{d}{dx}x^n=nx^{n-1},\frac{d}{dx}C=0]

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4x^3\frac{dx}{dt}=40(2)^4(1)

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Divide both sides by 4x³.

\frac{dx}{dt}=\frac{640}{4x^3}

\frac{dx}{dt}=\frac{160}{x^3}

Therefore the value of \frac{dx}{dt} is \frac{160}{x^3}.

4 0
3 years ago
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2 years ago
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Answer:

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Step-by-step explanation:

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The expression for the volume of a rectangular prism with the following value above can be represented below.

volume = 4.2 × 7.5 × w

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6 0
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