3 years ago

Andrea has 3 tiles one is a regular octagon one and one is a regular Pentagon

Mathematics

1 answer:

Stells [14]3 years ago

5 0

Answer:

but what we have to find ?????????????

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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:

$h=\sqrt{x^2+y^2}$

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

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

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

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

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:

$-16=\frac{y}{\sqrt {(x^2+y^2)}}*\frac{dy}{dt}\\-16=\frac{500}{\sqrt {(300^2+500^2)}}*\frac{dy}{dt}\\\frac{dy}{dt}=-18.66\ ft/s$

The elevator is descending at 18.66 ft/s.

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3 years ago

What is the area of a circle with a radius of 8 inches? Use 3.14 for .

OleMash [197]

Use pi•r^2 for the formula of a circle. filling it in, you get 3.14•64 which is 200.96

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3 years ago

Expand <br> (–5a^2+2a+3)(4a^2–2a+1)

fiasKO [112]

Answer:

Step-by-step explanation:

a • (a - 2) • (2a - 1)

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3 years ago

Jacob wants to use an elevator to carry identical packages having the same weight. Each package weighs 3 pounds and Jacob weighs

omeli [17]

(300-99) /3 - the remainder =n

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3 years ago

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Kipton puts one marshmallow on the scale and it weighs 7.2 grams. How much would 10 marshmallows weigh?

Maksim231197 [3]

Answer:

72 grams

Step-by-step explanation:

7.2 x 10 = 72

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2 years ago