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9966 [12]
3 years ago
6

If 140 bricks are used to build a wall 20 feet high, how many bricks will you use to build a wall 30 feet high?

Mathematics
1 answer:
Leokris [45]3 years ago
7 0

Answer:

210

Step-by-step explanation:

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I WILL GIVE 20 POINTS TO THOSE WHO ANSWER THIS QUESTION RIGHT NOOOO SCAMS AND EXPLAIN WHY THAT IS THE ANSWER
Step2247 [10]

Answer:

A = 297\pi

Step-by-step explanation:

To solve this problem we need to be familiar with the formula for the surface area of a cone:

A = \pi r(r + \sqrt{h^2+r^2})

We are given the length of a side and the diameter, to calculate the radius divide the diameter in half:

r = \frac{d}{2}\\r = \frac{18}{2}\\r = 9 cm

To calculate the height of the cone, we must use the Pythagorean Theorem:

C^2 = A^2 + B^2

We can treat the side length as the hypotenuse C, the radius as the base A, and solve for height B. Set the expression up like this:

C^2 = A^2 + B^2\\24^2 = 9^2 + B^2\\B^2 = 24^2 - 9^2\\B = \sqrt{24^2 - 9^2}\\B = \sqrt{576 - 81}\\B = \sqrt{495}\\B \approx 22.25

Now we can plug into our original formula:

A = \pi r(r + \sqrt{h^2+r^2})\\A = \pi 9(9+\sqrt{\sqrt{495}^2+9^2}\\A = \pi 9(9+\sqrt{495 + 81}\\A = \pi 9(9+\sqrt{576})\\A = \pi 9(9 + 24)\\A = \pi 9(33)\\A = 297\pi

5 0
2 years ago
The temperature in Sheffield is -7c
Genrish500 [490]

Answer:

24c

Step-by-step explanation:

Difference= big value - small value

When minus is put side by side, it becomes a plus.

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3 0
3 years ago
I REALLY need help with this! Could someone please help me?
tatyana61 [14]
Construction IV is the most logical answer hope this helps :)
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Answer:

A familial dispute amongst monarchs as to who inherited territory in the balkans.

Step-by-step explanation:

I learned from my mistake and it gave me that this was the answer.

Goodluck

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In a certain game, there are only two ways to score points; one way is worth 3 points, and the other is worth 5 points. If Tamsi
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Answer:

20 three-point scores

61/3=20 R1

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