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3 years ago

HELP ME HELP ME HELP ME

Mathematics

1 answer:

harina [27]3 years ago

5 0

The constant of proportionality is: 0.2 and the equation is: c = 0.2t

Step-by-step explanation:

Let t be the number of texts and c be the cost

Then according to given statement

c ∝ t

The proportionality symbol will be removed and a constant f proportionality will be introduced.

$c = kt$

For constant of proportionality:

$3.20 = k * 16\\k = \frac{3.20}{16}\\k = 0.2$

Hence the constant of proportionality is 0.2

Equation:

$c = 0.2t$

Hence,

The constant of proportionality is: 0.2 and the equation is: c = 0.2t

Keywords: Proportion, fractions

Learn more about proportion at:

#LearnwithBrainly

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The angle marked a = 146 Work out the angle marked x.

notka56 [123]

Answer:

<h2>34 degrees</h2>

Basic facts:

Corresponding angles are sometimes known as 'F' angles.

angles in a straight line add up to 180

Step-by-step explanation:

To find the other side of a we follow the Basic fact annd do

180-146

=34

following the rule, we know that this is a flipped F

An F is a corresponding angle

therefore f is 34

5 0

2 years ago

A storage tank will have a circular base of radius r and a height of r. The tank can be either cylindrical or hemispherical (ha

Neko [114]

Answer:

Volume: $\frac{2}{3}\pi r^3$

Ratio: $\frac{2}{9}r$

Step-by-step explanation:

First of all, we need to find the volume of the hemispherical tank.

The volume of a sphere is given by:

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

where

r is the radius of the sphere

V is the volume

Here, we have a hemispherical tank: a hemisphere is exactly a sphere cut in a half, so its volume is half that of the sphere:

$V'=\frac{V}{2}=\frac{\frac{4}{3}\pi r^3}{2}=\frac{2}{3}\pi r^3$

Now we want to find the ratio between the volume of the hemisphere and its surface area.

The surface area of a sphere is

$A=4 \pi r^2$

For a hemisphere, the area of the curved part of the surface is therefore half of this value, so $2\pi r^2$ . Moreover, we have to add the surface of the base, which is $\pi r^2$ . So the total surface area of the hemispherical tank is

$A'=2\pi r^2 + \pi r^2 = 3 \pi r^2$

Therefore, the ratio betwen the volume and the surface area of the hemisphere is

$\frac{V'}{A'}=\frac{\frac{2}{3}\pi r^3}{3\pi r^2}=\frac{2}{9}r$

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3 years ago

you can buy 3 apples at the quick market for $1.05 .You can buy 5 of the same apples at stop and save for $1.00 . which is the b

worty [1.4K]

Obviously the 5 apples for $1.00 is the better buy. You are getting more apples for less money.

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3 years ago

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enot [183]

Answer:

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Step-by-step explanation:

i dont have any drama !!!

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2 years ago

5 - (x + 5) > -2(x+4)

Vinil7 [7]

Answer:

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Step-by-step explanation:

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2 years ago

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