How do you solve for r in the formula a=pi r squared

Answers

Answer 1

Answer: To solve for y, all you have to do is just separate r from all of the others and make it equal to the rest of the equation. So first it was, a=pi*r squared.
Divide by pi on each side,
a/pi=r^2
Take the square root of each side;
square root of (a/pi) =r
and that's all
Hope this helps.

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What is bigger 3/6 or 4 /10

Answers

$(3)/(6)$ can be simplified to $(1)/(2)$

therefore, we can see that $(1)/(2)$ is bigger than $(4)/(10)$

or make the denominators are the same....

so, we look for the LCM of 10 and 6. That is 60. Whatever you do to the bottom you do the top. So, $(3)/(6)$ goes to $(30)/(60)$ . $(4)/(10)$ goes to $(24)/(60)$ now we can see that the first fraction ( $(3)/(6)$ )is bigger.

3/6=0.5
4/10=0.4
when you divide 3/6 it gives you 0.5.and when you divide 4/10 it gives you 0.4

In the figure , a || b and m 1= 34 degrees
What is m 2
_____ degrees

Answers

$m\angle 2=180-m\angle 1\nm\angle 2=180-34\nm\angle 2=146^(\circ)$

Which figure could be the result of dilating this rectangle with a scale factor between 0 and 1?

Answers

Answer:

Option B

Step-by-step explanation:

The figure is shown in the attachment.

The first figure is the main question.

The options are in the second attachment.

We want to chose the figure that could be the result of dilating this rectangle with a scale factor between 0 and 1.

When we dilate a figure with a scale factor between 0 and 1, the size of the figure shrinks but maintains the same orientation as the original figure.

Therefore the correct option is B.

Answer:

The sides of the resulting rectangle must be shorter than the original figure.

Step-by-step explanation:

The figures are missing, so I will answer this question in general terms. When a rectangle is dilated by a scale factor between 0 and 1 the resulting rectangle must have shorter sides than the original.

Let's say for example that the original has 2 sides 5 units length and the other 2 sides 8 units length. Then, the resulting figure will have 2 sides less than 5 units length and 2 sides 8 units length, where the proportion 5:8 must still be satisfied.

What percent of 8x is5x

Answers

62.5% what type of math question is this??

Answer:62.4%

Step-by-step explanation:

Mason gave the waiter a $14.58 tip, which was 15 percent of the dinner bill. What was the amount of the dinner bill before he added the tip?A.$9.72
B.$21.87
C.$97.20
D.$218.70

Answers

Answer:

C. $97.20

Step-by-step explanation:

Let the dinner bill be $x.

The tip given to the waiter is $14.58.

Also, it is given that the tip is 15% of the tip.

Thus we get the relation 15% of x = 14.58

i.e. 0.15x = 14.58

i.e. $x=(14.58)/(0.15)$

i.e. x = 97.20

Hence, the amount of dinner bill before the tip is added is given by $97.20

the answer is :

the amount of the bill before the tip = 14.58 *100 /15 = 97.20 $

What number is 20% of 20

Answers

10% of a number can be found by moving the decimal point over one space to the left.
20 move the decimal point to the left = 2
Now that we know that 10% of 20 is 2, we can find 20% by multiplying 2 by 2.
20% of 20 is 4.
Our answer is 4.

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