3 years ago

Help please I’ll give extra points and brainlist

Mathematics

1 answer:

lapo4ka [179]3 years ago

6 0

True

______

A closed circuit basically means everything is connected by wires and for this setup every device receives electricity making this true

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Which of the following equations is of a parabola with a vertex at (1, -2)?

arlik [135]

The general eaquation of a parabola in terms of its vertex is:

y = a(x - h)^2 + k

where the vertex point is (h, k)

therefore, an equation of a parabola with vertex (1, -2) is:

y = 5(x - 1)^2 - 2

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3 years ago

An automobile travels past the farmhouse at a speed of v = 45 km/h. How fast is the distance between the automobile and the farm

yulyashka [42]

Answer:

$\frac{ds}{dt} = 39.586 km/h$

Step-by-step explanation:

let distance between farmhouse and road is 2 km

From diagram given

p is the distance between road and past the intersection of highway

By using Pythagoras theorem

$s^2 = 2^2 +p^2$

differentiate wrt t

we get

$\frac{d}{dt} s^2 = \frac{d}{dt} (4 + p^2)$

$2s \frac{ds}{dt} =2p \frac{dp}{dt}$

$\frac{ds}{dt} = \frac{p}{s}\frac{dp}{dt}$

$\frac{ds}{dt} = \frac{p}{\sqrt{p^2 +4}} \frac{dp}{dt}$

putting p = 3.7 km

$\frac{ds}{dt} = \frac{3.7}{\sqrt{3.7^2 +4}} 45$

$\frac{ds}{dt} = 39.586 km/h$

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3 years ago

Whats 3,684,266 to the nearest hundred thousand and million

grin007 [14]

The nearest hundred thousand is 3,700,000
And the nearest million is 4,000,00

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If the height of the cylinder is 3 inches, what is the volume of the cylinder? Write your answer in terms of p.

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Formula for Volume of Cylinder you need the radius

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