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3 years ago

2. If 40% of a number is 56, what was the original number Can someone help me for this one pls

Mathematics

2 answers:

ziro4ka [17]3 years ago

4 0

Answer:

140

Step-by-step explanation:

evablogger [386]3 years ago

3 0

140 is the answer to this question

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Can someone help? I can't figure this out.

My name is Ann [436]

Answer:

Step-by-step explanation:

It seems to be a dilation of 1/2

Your welcome

Hope this helps

Pls mark brainliest, I really need it

- massmaster34

6 0

3 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

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

6 0

3 years ago

Lem is playing a board game and needs to roll two dice and get a six on both die in order to win the game. What is the probabili

tangare [24]

The probability of getting a 6 on one dice is 1/6

The probability of getting a 6 on both dice would be 1/6 x 1/6 = 1/36

Answer: 1/36

3 0

3 years ago

1. What is the volume of the triangular prism below? h = 6.7 m 2 VBA 12.4 m 8 m

monitta

Answer:Remember the formula for calculating volume is: Volume = Area by height. V = A X h.

For a triangle the area is calculated using the formula: Area = half of base by altitude. A = 0.5 X b X a.

So to calculate the volume of a triangular prism, the formula is: V = 0.5 X b X a X h.

7 0

3 years ago

Given the function h of x equals negative 2 times the square root of x, which statement is true about h(x)?

gavmur [86]

Using translation concepts, it is found that the correct statement about h(x) is:

The function is decreasing on the interval (0, ∞).

<h3>What is a translation?</h3>

A translation is represented by a change in the function graph, according to operations such as multiplication or sum/subtraction in it's definition.

In this problem, the parent function is:

$f(x) = \sqrt{x}$

Which is increasing on (0, ∞).

After the translation, the function is:

$h(x) = -2\sqrt{x}$

It was multiplied by a negative number, which means that it was reflected over the x-axis, and it will be decreasing on the interval (0, ∞).

More can be learned about translation concepts at brainly.com/question/4521517

7 0

2 years ago