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zloy xaker [14]
3 years ago
12

Please help me with this

Mathematics
1 answer:
Vikki [24]3 years ago
8 0

Answer:

V=38.25

Step-by-step explanation:

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A washer and dryer costa total of $1160. The cost of the washer is three times the cost of the dryer. Find the cost of each item
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W = 3d
d + 3d = 1160
4d = 1160
  d = 290

w = 290 x 3 = 870
answer
washer = $870
dryer = $ 290
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dimulka [17.4K]

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Step-by-step explanation:

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The radius of the base of a cylinder is increasing at a rate of 777 millimeters per hour. The height of the cylinder is fixed at
Tatiana [17]

Answer:

252<em>π</em>  or 791.7 mm³/h

Step-by-step explanation:

The volume of a cylinder is given by

V = \pi r^2h

We desire to find the volume rate, that is,\dfrac{dV}{dt}

\dfrac{dV}{dt} = \dfrac{dV}{dr}\cdot\dfrac{dr}{dt}

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<em>dV/dr</em> is derived by differentiating the volume equation, yielding

\dfrac{dV}{dt} = 2\pi rh

At <em>r</em> = 12 mm and <em>h</em> = 1.5 mm,

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