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3 years ago

Number 5!! please help me please

Mathematics

1 answer:

tensa zangetsu [6.8K]3 years ago

7 0

Answer:

2500

Step-by-step explanation:

Profit means the amount of money you have leftover after you make money and then spend that money on rent and groceries or expenses. Profit is something positive, therefore the internet would be positive as well. Just remember:

Gross - Net = Profit

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Pyramid A has a triangular base where each side measures 4 units and a volume of 36 cubic units. Pyramid B has the same height,

omeli [17]

Answer:

The volume of pyramid B is 81 cubic units

Step-by-step explanation:

Given

<u>Pyramid A</u>

$s = 4$ -- base sides

$V = 36$ -- Volume

<u>Pyramid B</u>

$s = 6$ --- base sides

Required

Determine the volume of pyramid B <em>[Missing from the question]</em>

From the question, we understand that both pyramids are equilateral triangular pyramids.

The volume is calculated as:

$V = \frac{1}{3} * B * h$

Where B represents the area of the base equilateral triangle, and it is calculated as:

$B = \frac{1}{2} * s^2 * sin(60)$

Where s represents the side lengths

First, we calculate the height of pyramid A

For Pyramid A, the base area is:

$B = \frac{1}{2} * s^2 * sin(60)$

$B = \frac{1}{2} * 4^2 * \frac{\sqrt 3}{2}$

$B = \frac{1}{2} * 16 * \frac{\sqrt 3}{2}$

$B = 4\sqrt 3$

The height is calculated from:

$V = \frac{1}{3} * B * h$

This gives:

$36 = \frac{1}{3} * 4\sqrt 3 * h$

Make h the subject

$h = \frac{3 * 36}{4\sqrt 3}$

$h = \frac{3 * 9}{\sqrt 3}$

$h = \frac{27}{\sqrt 3}$

To calculate the volume of pyramid B, we make use of:

$V = \frac{1}{3} * B * h$

Since the heights of both pyramids are the same, we can make use of:

$h = \frac{27}{\sqrt 3}$

The base area B, is then calculated as:

$B = \frac{1}{2} * s^2 * sin(60)$

Where

$s = 6$

So:

$B = \frac{1}{2} * 6^2 * sin(60)$

$B = \frac{1}{2} * 36 * \frac{\sqrt 3}{2}$

$B = 9\sqrt 3$

So:

$V = \frac{1}{3} * B * h$

Where

$B = 9\sqrt 3$ and $h = \frac{27}{\sqrt 3}$

$V = \frac{1}{3} * 9\sqrt 3 * \frac{27}{\sqrt 3}$

$V = \frac{1}{3} * 9 * 27$

$V = 81$

6 0

3 years ago

Read 2 more answers

Please help me on question 6 please, please

fiasKO [112]

Answer:

7; 40

Step-by-step explanation:

No symbol for the term that you are solving for . I will use β

V = βwh Divide by (wh)

V/(wh) = β

β = V/(wh)

β = 735/(21 × 5) = 7

β = 3312/(11.5 ×7.2) = 40

6 0

3 years ago

Jemima bought 150 oranges at ¢12 and sold them at 6 for 30gp find the profit or loss

stepan [7]

Answer:

Step-by-step explanation:

To calculate either the profit or loss we must first find the cost price and the selling price

<u>For the cost price</u>

She bought 150 oranges at ¢12

Cost price = ¢ 12.00

<u>For the selling price</u>

She sold 6 at 30 Gp that's ¢ 0.30

If she sold 6 at ¢ 0.30

Then 150 will be 150× 0.3/ 6

Selling price = ¢ 7.50

Since the cost price is higher than the selling price she made a loss

Loss = Cost price - Selling price

Loss = ¢ 12 - ¢ 7.50

Hope this helps you

8 0

3 years ago

Helen is a secretary and earns $10.82 per hour she worked 38 hours last week , what is her straight-time pay?

NikAS [45]

Answer:

Answer is : $411.16

Step-by-step explanation:

How much she earns per hour which is $10.82 times by the total hours she have worked 38h then you get the answer which is $411.16

$10.82 X 38 hours = $411.16 total

3 0

3 years ago

What is the square root of 0.0016

Umnica [9.8K]

.04 and my answer needs to be 20 characters long

4 0

3 years ago