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2 years ago

Pls explain step by step and pls yell by are adding dividing multiplying etc

Mathematics

1 answer:

ikadub [295]2 years ago

5 0

Answer:

Can you show the whole question

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A student bought 34 pencils for school.if he sharpened 16 of the pencils before school whats is his ratio of unsharpened pencils

Sergio [31]

he bought 34 pencils which I suppose aren't already sharpened

so if he sharpens 16 of them just subtract 16 from 34 (34-16) which equals 18

so the ratio would be 16:18

but if u need to simplify it would be 8:9

3 0

3 years ago

How to identify reasonable domain and range

puteri [66]

Answer:

The domain is the input values on the x-axis and range is input values on the y-axis

Step-by-step explanation:

Basically, domain is the horizontal values and range is the vertical ones.

6 0

3 years ago

What is the answer 5•(14+6)+4

Gala2k [10]

PEMDAS
add 14 to 6
5*(20)+4
multiply
100+4
104

5 0

3 years ago

Read 2 more answers

Which is a valid proportion? 3 over 4 = 21 over 28

dangina [55]

Answer: I think that it is the first one

5 0

3 years ago

The radius of a sphere is increasing at a rate of 4 mm/s. How fast is the volume increasing (in mm^3/s) when the diameter is 60

nexus9112 [7]

Answer:

The volume is increasing at a rate of 1508 cubic millimeters per second when the diameter is 60 mm.

Step-by-step explanation:

Volume of a sphere:

The volume of a sphere is given by the following equation:

$V = \frac{4\pi r^3}{3}$

In which r is the radius.

Implicit derivatives:

This question is solving by implicit derivatives. We derivate V and r, implicitly as function of t. So

$\frac{dV}{dt} = 4\pi r^2 \frac{dr}{dt}$

The radius of a sphere is increasing at a rate of 4 mm/s.

This means that $\frac{dr}{dt} = 4$

How fast is the volume increasing (in mm^3/s) when the diameter is 60 mm?

This is $\frac{dV}{dt}$ when $r = \frac{d}{2} = \frac{60}{2} = 30$ . So

$\frac{dV}{dt} = 4\pi r^2 \frac{dr}{dt}$

$\frac{dV}{dt} = 4\pi*(30)^2*4$

$\frac{dV}{dt} = 1508$

The volume is increasing at a rate of 1508 cubic millimeters per second when the diameter is 60 mm.

7 0

3 years ago