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2 years ago

How long will it take for an undersea sonar pulse to travel 3 km?

Mathematics

1 answer:

Deffense [45]2 years ago

6 0

Answer:

2 seconds

Step-by-step explanation:

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a sculpture is formed from a cylinder resting on top of a cuboid. the cylinder has a radius 40cm and height 70cm. the cuboid mea

frosja888 [35]

<u>Answer-</u>

$\boxed{\boxed{\text{Mass}=10.0447256\ ton}}$

<u>Solution-</u>

The dimensions of the cuboid is, 80×80×140 cm

So, its volume will be $=80\times80\times140=896000$ cm³

The dimensions of the cylinder is, radius = 40cm, height = 70cm

So, its volume will be $\pi r^2h=\pi\times40^2\times70=351792$ cm³

Total volume,

$V=V_{\text{Cylinder}}+V_{\text{Cuboid}}\\\\=351792+896000\\\\=1247792\ cm^3$

As we know,

$\Rightarrow \text{Density}=\dfrac{\text{Mass}}{\text{Volume}}$

$\Rightarrow \text{Mass}=\text{Density}\times \text{Volume}$

$\Rightarrow \text{Mass}=8.05\times 1247792=10044725.6\ g$

$\Rightarrow \text{Mass}=10044725.6\times 10^{-6}=10.0447256\ ton$

8 0

3 years ago

SEND HELP YO Find and simplify the area (You need to completely multiply it out and include units in your answer):

Ad libitum [116K]

Answer:

$Area = 2m^8 - 6m^4 + 4.5$

Step-by-step explanation:

Given

$Base = 2m^4 - 3$

$Height = 2m^4 - 3$

Required

The area

This is calculated as:

$Area = 0.5 * Base * Height$

$Area = 0.5 * (2m^4 - 3) * (2m^4 - 3)$

Open brackst

$Area = 0.5 * (4m^8 - 6m^4 - 6m^4 + 9)$

$Area = 0.5 * (4m^8 - 12m^4 + 9)$

Open bracket

$Area = 2m^8 - 6m^4 + 4.5$

5 0

2 years ago

on jan 22 0217 the cost to mail a letter in the us was raised from 47 to 49 centrs. find the relative change in the cost

Nikolay [14]

The relative change is 2%.

<h3>What is relative change?</h3>

In contrast to the reference value, the absolute change's size is expressed as a fraction called the relative change: relative change = absolute change reference value = new value reference value reference value. The absolute change is expressed as a percentage of the value of the indicator in the prior period, or "relative change" expresses the absolute change as such. When measuring indicators in percentage terms, such as the unemployment rate, absolute and relative change principles also apply. To determine the absolute change, subtract the starting value from the ending value. Simply deduct 1,000 from 1,100 to arrive at 100 in the example. The student population increased by 100 pupils throughout the course of the year because this is the absolute change.

To know more about relative change ,visit:

brainly.com/question/20610028

#SPJ4

5 0

1 year ago

Solve for the value of x

elixir [45]

Answer:

x = -5

Step-by-step explanation:

These are alternate exterior angles and alternate exterior angles are equal

110 = x+115