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3 years ago

Find the area of each circle to the nearest tenth. Use 3.14

Mathematics

2 answers:

Oksi-84 [34.3K]3 years ago

8 0

Answer:

50.24

Step-by-step explanation:

Area formula: Pi x R^2 or Pi x R x R

3.14x4x4=50.24

Can I get Brainlest pls

svetlana [45]3 years ago

7 0

Area of Circle: $\pi r^{2}$

radius 'r' = 4ft (radius is half of diameter)
$\pi =3.14$

Area equals = 3.14 (4)^2 = 50.24 square feet = 50.2 square feet

Hope that helps!

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I'm giving brainliest to the most helpful answer. For 50 points:

Alenkinab [10]

Answer:

1) $\displaystyle\frac{5}{18}\approx27.78\%$

2) $\displaystyle\frac{4}{7}\approx57.14\%$

3) $\displaystyle \frac{13}{16}=81.25\%$

Step-by-step explanation:

We are given a two-way frequency table. Using the table, we will determine the probability for each case.

Question 1)

P(A Student With A Part Time Job Without A Car)

Using the first column, the total number of students that have a part time job is 78+30=108.

Likewise, using the first column, we can see that out of those 108 students, 30 do not have a car.

Hence, the probability that a student with a part time job without a car is:

$\displaystyle P=\frac{30}{108}=\frac{5}{18}\approx27.78\%$

Question 2)

P(No Car | Does Not Have A Part Time Job)

Remember that the vertical line means conditional probability.

So, we want the probability of a student having no car given that they do not have a part time job.

Using the second column, we can see that the total number of students that do not have a part time job is 18+24=42.

Likewise, using the second column, 24 do not have a car.

Hence, the probability that a student with a part time job without a car is:

$\displaystyle P=\frac{24}{42}=\frac{4}{7}\approx57.14\%$

Question 3)

P(Part Time Job | Car)

So, we want to probability of a student having a part time job given that they have a car.

Using the first row, the total students that have a car is 78+18=96.

And of those 96 students, 78 have a part time job.

Hence, the probability that a student with a car has a part time job is given by:

$\displaystyle P=\frac{78}{96}=\frac{13}{16}=81.25\%$

4 0

3 years ago

What is the slope of the line passing through (-3, 5) and (5,-3)?

Gnoma [55]

Answer:

-1

Step-by-step explanation:

x y x2 y2

-3,5 and 5,-3

-3-5/5-(-3)

-8/8

the slope is -1/1

y2-y1 / x2-x1=slope of the two points

5 0

3 years ago

A coach of a baseball team orders hats for the 12 players on his team. Each hat costs $9.95. The shipping charge for the entire

Ronch [10]

Answer:

124.4

Step-by-step explanation:

12 x 9.95 = 119.4 dollars

119.4+5.00=124.4

The total cost is $124.40.

6 0

3 years ago

PLEASE IS DUE IN A FEW MINUTES..

hjlf

Looks like you are screwed good luck:)

3 0

3 years ago

Find the exact value of: sin13pi/8

Vikentia [17]

Sin(13π/8) , is in quadrant IV so the angle will be negative, find the reference angle.

sin(13π/8) = -sin(16π/8 - 13π/8) = -sin(3π/8) = -cos(4π/8 - 3π/8) = - cos(π/8). 

Use half angle formula for cos(x): 
cos²(x/2) = (cos(x) + 1) / 2 
Let x = π/4 
cos²(π/8) = (cos(π/4) + 1) / 2 
cos²(π/8) = (√(2) / 2 + 1) / 2 
cos(π/8) = √(√(2) / 4 + 1/2) 

-cos(π/8) = -√((√(2) + 2) / 4)

7 0

4 years ago

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