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Alexxandr [17]
2 years ago
13

The radius of a circle is 8 feet. What is the circle's area? Use 3.14 for ​.

Mathematics
2 answers:
Tasya [4]2 years ago
4 0

Answer:

50.27

Step-by-step explanation:

remember that the circumference of a circle is 2πr

so 3.15x8 and then multiply by two

Ainat [17]2 years ago
3 0

Answer:

200.96 ft²

Step-by-step explanation:

Step 1: <u>Define/formula</u>

To find the area of a circle, multiply the radius by itself twice, then multiply the product by pi.

a=\pi r^2(3.14*radius*radius)

Step 2: <u>Solve</u>

According to the word problem, the radius is 8.

From here, we plug the numbers into the formula.

\pi 8^2(3.14*8*8)=200.96ft^2.

Step 3: <u>Conclude</u>

Therefore, the area of this circle is 200.96 ft.²

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Mark made a business trip of 259.5 miles. He averaged 59mph for the first part of the trip and 57mph for the second part. If the
max2010maxim [7]

Answer:

Step-by-step explanation:

d = r * t

Let the time at 59 miles /  hour be t

59*t + 57* (4.5 - t) = 259.5              Remove the brackets

59*t + 256.5 - 57*t = 259.5            Combine the left

2t + 256.5 = 259.5                         Subtract 228 from both sides

2t = 259.5 - 256.5                          Combine

2t =  3                                              Divide by 2

t = 1.5

So he spent 1.5 hours going at 59 miles per hour

He spent 4.5 - 1.5 = 3 hours going 57 miles per hour.

                               

8 0
2 years ago
Solve the following quadratic by<br> completing the square.<br> y = x2 + 10x + 10
IgorC [24]

Answer:

<h2>         x = -5 - √15    or   x = -5 + √15</h2>

Step-by-step explanation:

y = x^2+10x+10\\\\y=x^2+10x+25-25+10\\\\y=(x+5)^2-15\\\\y=0\quad\iff\quad (x+5)^2-15=0\\\\(x+5)^2=15\\\\x+5=\pm\sqrt{15}\\\\x=-5-\sqrt{15}\quad or\quad x= -5+\sqrt{15}

3 0
3 years ago
What is (3-4i)^2? In complex numbers?
ANTONII [103]
(3-4i)^2=9-24i-16=-7-24i
5 0
3 years ago
Please help! this is kind of easy
solniwko [45]

Answer:

1st integer=x

2nd integer=x+1

3rd integer=x+2

4th integer=x+3

 

2(x +(x+2))= 3(x+1) +11

 

solve

 

2 (2x +2) = 3x + 3 + 11

 

4x + 4     = 3x + 14

 

-3x-4       =-3x -4

 

 

           x=10

 

1st integer=10

2nd integer=11

3rd integer=12

4th integer=13

Step-by-step explanation:

hopefully this helped

4 0
3 years ago
Read 2 more answers
Please solve all of these, 50 points and I will be marking it brainliest, no links, they will be reported.​
Gwar [14]

Step-by-step explanation:

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2 years ago
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