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Stels [109]
2 years ago
14

PLEASE:

Mathematics
1 answer:
Tju [1.3M]2 years ago
3 0

Answer:

63.59 in²

Step-by-step explanation:

The formula to find the area of a square: a², where a is the side.

The formula to find the area of a circle: πr², where r is the radius (diameter ÷ 2), and the pi is alterable (3.14 or 3.142 or 22/7).

1) Find the diameter of the circle. The side of a square is the diameter.

a²

a = √81

a = 9

2) Plug the values into the formula of the area of a circle. 9 ÷ 2 = 4.5 (radius).

= 3.14 x 4.5²

= 3.14 x 20.25

= 63.585

3) Round off the result to the nearest hundredth.

= 63.59

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The first solution contributes 0.78*1 = 0.78 L of acid.

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8 0
3 years ago
Answer it please. brainliest if correct​
Firdavs [7]
The answer is x=4 & y=3
5 0
3 years ago
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Find the area of the shaded figure below. Use 3.14 for pi. NO LINKS OR IMPROPER ANSWERS
Lapatulllka [165]

Answer:

The area of the shaded region is about 58.9 square inches.

Step-by-step explanation:

To solve this question, let's recall some facts.

We know that the area of a circle can be defined as the following:

A = \pi r^2

where r is the radius of the circle.

We too know that circles have a diameter and a radius. The diameter of a circle is the distance a line that connects two points on a circle with its center, and the radius is half of the diameter.

We also know that figures can touch each other, or be in tangent with each other. For the sake of simplicity, we're going to assume that the shaded circles are in tangent with each other, or touch each other. Because they touch each other, these three circles can share 5 in. of the 15 in. rectangle. This means that the circles are 5 in. in diameter, or 2.5 in in radius.

Now, we can solve the problem.

Because we have 3 circles, each with 2.5 in. radii, we can have the following expression which represents the total area of these circles:

3*\pi (2.5)^2

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6 0
2 years ago
20 POINTS AND BRAINLIEST ANSWER
soldi70 [24.7K]
Let's look at our equation,
<span>p÷7

We must look at all our options before selecting one of them.

Can the answer be A?

</span><span>Jayna does not know how many pages she needs to read. She knows she has already read for 7 days.
</span><span>
No that would not work,
We would have subtraction. It would look like this.
p-7.

How about B?

</span><span>Jayna does not know how many pages she needs to read. She knows that she has 7 days to finish her book.
</span><span>
That would actually work. This is how our equation would look. 
p</span>÷7. 
<span>It matches the expression.

Before we make that our final answer, we should check everything else.

Here is C
</span><span>C.
Jayna does not know how many days she has to finish reading. She knows she has to read 7 more pages.
</span>
That would not work.

How about D?

<span>D.
Jayna does not know how many pages she has already read. She knows she has to read 7 more.
</span>
D is also incorrect. It would not work at all.

That means our final answer is:

<span>B.
Jayna does not know how many pages she needs to read. She knows that she has 7 days to finish her book.
</span>
I hope that helped! :)

5 0
2 years ago
Read 2 more answers
What does y equal if x-y=3
Orlov [11]

Answer: We need to know the value of y >:3 Tricky Tricky

Step-by-step explanation:

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