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3 years ago

12

Airplanes are sometimes used to fight fires . A certain airplane can deliver 3.9 * 10^4 liters of water in one trip . How much w

ater can this airplane reliever in 7 trips
Write in scientific notation !!!!!!

1 answer:

MakcuM [25]3 years ago

7 0

Answer:

just do 3.9*10000=39000

Step-by-step explanation:

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3 years ago

You are situated 300 feet from the base of Tower Glitz Plaza watching an external elevator descend down the side of the building

nordsb [41]

Answer:

18.66 ft/s

Step-by-step explanation:

The distance between you and the elevator is given by:

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The rate of change for the distance between you and the elevator is given by:

$\frac{dh}{dt}=\frac{dh}{dy}*\frac{dy}{dt}$

$-16=\frac{dh}{dy}*\frac{dy}{dt}$

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Applying the chain rule:

$u=x^2+y^2\\\frac{dh}{dy}=\frac{d\sqrt u}{du} *\frac{du}{dy}\\\frac{dh}{dy}=\frac{1}{2\sqrt u} *2y\\\frac{dh}{dy}=\frac{y}{\sqrt {(x^2+y^2)}}$

Therefore, at x=300 and y = 500, dy/dt is:

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The elevator is descending at 18.66 ft/s.

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3 years ago

Find the exact circumference of a circle with the given radius 5” c=?

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Answer: 10pi

Step-by-step explanation:

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3 years ago

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2 years ago

Pls help help me need help!!

BARSIC [14]

Answer:

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Step-by-step explanation:

$\mid -20 \mid +\mid 30\mid = \\\\20+30= \\\\50$

Hope this helps!

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3 years ago

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