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3 years ago

A round mirror has a radius of 5.3 inches. What is the area of the mirror in square inches, rounded to the nearest tenth?

Mathematics

1 answer:

GrogVix [38]3 years ago

7 0

Answer:

88.2 squared

Step-by-step explanation:

The formula to find the area of a circle is <em>a = pi * r ^2</em>

Let's replace the values that we know.

a = 3.14 x 5.3 ^2

First, we should do 5.3 ^2, which is 28.09.

a = 3.14 x 28.09

Now we are able to do 3.14 x 28.09 which is 88.2026

But that isn't it! We need to round to the nearest tenth, which is this digit:

88.<u>2</u>026

Since next to the 2 there is a 0, you take out all the numbers after that 2. Which leaves you with:

88.2

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A discount of 18% on a tennis racquet reduced its price by $16.91. What was the sale price?

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3 years ago

What is the answer to x+9=12

Alenkinab [10]

Answer: x = 3

Step-by-step explanation:

x + 9 = 12

x = 12 - 9

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3 years ago

Read 2 more answers

What are the positive and negative square roots of 1?

vredina [299]

Answer:

Positive is 1

Negative is-1

Step-by-step explanation:

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3 years ago

Paige’s back yard has an area of 95.9 square meters of the length of the yard is 14 meters what is the width

Mandarinka [93]

Your answer is 6.85 meters

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3 years ago

Last time, one out of every 4 students in our class was absent. This time, after Jen came back, only one out of every 5 students

VMariaS [17]

Answer: There are 20 students and 4 students are not here today.

Step-by-step explanation:

If the number of students = 4

Let the number of students be 'x'.

Fraction of students absent = $\dfrac{x}{4}$

If the number of students = 5

Fraction of students absent = $\dfrac{x}{5}$

And Jen came back,

So, the fraction of student absent is also written as

$\dfrac{x}{4}-1$

According to question, it becomes,

$\dfrac{x}{5}=\dfrac{x}{4}-1\\\\\dfrac{x}{5}=\dfrac{x-4}{4}\\\\4x=5(x-4)\\\\4x=5x-20\\\\4x-5x=-20\\\\-x=-20\\\\x=20$

Hence, there are 20 students in our school.

And number of students are not here today is $\dfrac{20}{5}=4$

3 0

3 years ago