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3 years ago

What is the area of a semicircle that has a radius of 30 feet

Mathematics

1 answer:

adoni [48]3 years ago

3 0

Answer:

A = 1413.72 unit²

Step-by-step explanation:

area of a semicircle formula: A = (πr²)/2

To find the area of a semicircle that has a radius of 30 feet, apply r = 30 to the formula A = (πr²)/2:

A = (π30²)/2

A = 1413.72 unit²

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Show ALL your calculations.

Nesterboy [21]

Answer:

<DEB= 125 degrees

Step-by-step explanation:

To get this, you would need to know all 2 angles of the triangle.

To find the first angle, simply do 180-107 to get 73(because supplementary angles add up to 180 degrees).

Next, 180-52(given angle)-73 to get 55 because the 3 angles of a triangle add up to 180(triangle angle sum theory).

You would see that <DEB is part of another supplementary angle so, do 180-55 to get 125.

<DEB=125 degrees.

8 0

2 years ago

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Which of the four graphs has the greatest standard deviation? please help me

Norma-Jean [14]

Answer:

Standard deviation is how far away the values are from the mean.
All of your graphs have normal distribution, meaning the mean is in the center.

The more spread out your graph is, the greater the standard deviation.

So the option with the most spread out graph, which I think is A, can't see very clear.

3 0

2 years ago

PLZ ANSWER! REALLY NEED HELP AND WILL MARK BRAINLIEST!!! PLZZZZZ!!!

olga nikolaevna [1]

Answer:

Step-by-step explanation:

1) the slope-interception form of the given line is:

y=s*x+i, where s - the slope, i - interception;

according to the condition it is

y=1/8*x+i;

2) if to substitute the coordinates of the given point (-10;4) into the slope-interception form, then:

4=1/8* (-10)+i, ⇒ i=21/4;

the equation of the given line is:

y=1/8*x+21/4

3) according to the condition the given point with the coordinates (-6;w) belongs to the line. It means, it is possible to substitute its coordinates into the equation, then calculate the value of the 'w':

w=1/8*(-6)+21/4; ⇒ w=9/2.

Answer C. 9/2

Note: the suggested option is not the only.

6 0

2 years ago

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how many different angles would be formed by a transversal intersecting three parallel lines? How many different angle measureme

RSB [31]

You would get alternating interior and exterior angles, corresponding and consecutive angles, and vertical angles. There would be only two different angle measurements, which would add to 180 degrees, the degree of one straight line.

5 0

2 years ago

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People I Really Need Help With These Questions!!!

Pavlova-9 [17]

Answer:

$200

Step-by-step explanation:

1. if you take $5 for each car wash then you take total of the cars they washed and then you times 40x5=200 then you subtract the total amount of money they paid for the supplies. Which was $32 and 200-32=168.

2. No they will not because if you go 5,10,15,20,25,30,35,40,45,50,60,65,70,75,80,85,90,95,100,105,110,115,120,125,130,135,140,145,150,155,160,165,170,175,180,185,190,195,200.

and as in there no where is 107. so No there is no point where theywill have exactly $107

8 0

2 years ago