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zepelin [54]
3 years ago
14

If the radius of a circle is increased by 100%, then the area is increased by:

Mathematics
1 answer:
shtirl [24]3 years ago
5 0
A_1=\pi r^2\\\\R=2r\ then\ A_2=\pi R^2\to A_2=\pi(2r)^2=4\pi r^2\\\\A_2-A_1=4\pi r^2-\pi r^2=3\pi r^2=3A_1\\\\3=300\%\\\\Answer:(C).
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Solve for x. Round to the nearest tenth, if necessary. 1.8 & x
Valentin [98]

Answer:

x ≈ 1.4

Step-by-step explanation:

Using the sine ratio in the right triangle

sin50° = \frac{opposite}{hypotenuse} = \frac{RS}{RT} = \frac{x}{1.8} ( multiply both sides by 1.8 )

1.8 × sin50° = x , then

x ≈ 1.4 ( to the nearest tenth )

7 0
3 years ago
to increase the mean of 4 numbers by 2, by how much would the sum of the 4 numbers have to increase? check image.
solong [7]

Answer:

8

Step-by-step explanation:  

x=average

(x+x+x+x)/4=average

to increase x by 2 you add 2

x+2=average

(x+2+x+2+x+2+x+2)=4=(4x+8)/4=x+2

you'd have to increase the sum by 8 to make the numbers' averages' go up by 2

8 0
2 years ago
Is the number of points scored during a basketball game a discrete random​ variable, a continuous random​ variable, or not a ran
monitta

Answer: Option (B) is correct.

Step-by-step explanation:

The number of points scored during a basketball game is a discrete random variable.

Discrete Random variable:

A discrete random variable is a variable whose value can be evaluated by counting. It is also referred as a countable and finite values. Examples of discrete random variable are as follows:

-The quantity of runs scored during a ball game  

- Number of hits a site gets during seven days  

- Number of lights that wear out in the following year in a stay with 13 bulbs  

- Number of pigeons in a city  

- Number of free-toss endeavors before the principal shot is missed

3 0
3 years ago
Read 2 more answers
The sides of a rectangle in the coordinate plane are parallel to the axes two of the vertices of the rectangle are (3,-2) and (-
Llana [10]

Answer:

C(-4,-2), D(3,-7)

Ar=35unit^{2}

Step-by-step explanation:

we procced to identify points:

A(-4,-7), B(3,-2)

for being the sides of a rectangle parallel to the axes, we find the other two vertices (VIEW GRAPH)

C(-4,-2), D(3,-7);  Area of the rectangle Ar=b*h, where

b=(X_{D}-X_{A}); h=(Y_{B}-Y_{D})

So Ar=(3-(-4))*(-2-(-7)) = (3+4)*(-2+7)=7*5=35unit^{2}

7 0
3 years ago
Solve -10&lt;3x+2&lt;8 <br> i’ll give brainliest please help it’s a quiz question (extra points)
Tanya [424]

Answer:

-4 < x < 2

Step-by-step explanation:

You can look up the answer on symbolab, get the premium for $4-5 a month it helps a lot with math subjects and is 90-95% accurate.

7 0
2 years ago
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