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3 years ago

A cope machine makes 32 copies per minute. How many copies does it make in 4minutes and 15 seconds?

Mathematics

2 answers:

Zarrin [17]3 years ago

7 0

Answer:

136

Step-by-step explanation:

4 times 32 = 128

32/4=8

128+8=136

mina [271]3 years ago

7 0

Answer:

135

Step-by-step explanation:

1. divide 32 by 60 to get how many copies per second

$32/60 = 0.533$

2. convert 4min and 15 sec to seconds

it is 255 seconds

3. Multiply copies per second by number of seconds

$0.533(255) = 135.91$

4. Round down to whole number because you can't copy part of a paper

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Explanation on How to answer what is the density of an object that has a mass of 73,430 and the volume of 7 m3

scZoUnD [109]

Answer:

Density = 10,490 g/m³

Step-by-step explanation:

Density = mass ÷ volume

here mass = 73,430 g

volume = 7 m³

density = 73,430 ÷ 7

= 10490 g/m³

Density = 10,490 g/m³

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3 years ago

Samantha can make 15 pizzas in 2.5 hours. What is Samantha's rate per

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3 years ago

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ruslelena [56]

Answer:

1131 m^3

Step-by-step explanation:

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1130.97

then round the number by nearest tenth.

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3 years ago

A potter forms a piece of clay into a cylinder. As he rolls it, the length, L, of the cylinder increases and the radius, r, decr

Elena L [17]

Answer:

$0.0727 cm\: per\: second$

Step-by-step explanation:

The Volume of the cylinder is constant

Volume of a cylinder, $V=\pi r^2h$

Given:

$\frac{dh}{dt}=0.8 cm/sec\\ r=2cm\\h=11cm\\\frac{dr}{dt}=?$

$\frac{dV}{dt}=\pi r^2 \frac{dh}{dt} + 2\pi r h\frac{dr}{dt}$

$0=\pi* 2^2*0.8 + 2\pi*2*11\frac{dr}{dt}\\0=3.2\pi+44\pi\frac{dr}{dt}\\44\pi\frac{dr}{dt}=-3.2\pi\\\frac{dr}{dt}=\frac{-3.2\pi}{44\pi} \\\frac{dr}{dt}=-0.0727 cm\: per\: second$

The radius is decreasing at a rate of $0.0727 cm\: per\: second$

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3 years ago