Please help thx 10 poin

When finding the AREA of a circle, you should square the radius first and then multiply by π.

Mrrafil [7]

Answer:

Yes

Step-by-step explanation:

4 0

4 years ago

Dilate a square with vertices $\left(0,\ 0\right)$(0, 0) , $\left(0,\ 4\right)$(0, 4) , $\left(4,\ 4\right)$(4, 4) , and $\le

ololo11 [35]

Using coordinates rule of Dilation , The ratio (new to original) of perimeter is 1/√2

The ratio of (new to original) of area is ½

The coordinates of the vertices of Square are (0,0),(0,4),(4,0) and (4,4).

Let the vertices be

A(0,0),B(0,4),C(4,0),D(4,4) of square ABCD. Also , scaling factor k= 0.5 or ½ .

Now, we shall find out the coordinates of square KLMN which is image of Square ABCD.

Use the coordinates rule for dilation with k= ½

(x,y) → (kx , ky)

(kx , ky ) represents coordinates of new square KLMN.

(0,0) →(0,0)=K(0,0)

(0,4)→ ( 0×(1/2), 4(1/2))= L(0,2)

(4,0)→( 4(1/2), 0(1/2)) = M(2,0)

(4,4)→( 4(1/2), 4(1/2)) =N (2,2)

Side of square ABCD is find out by distance formula i.e., d= √square of difference of x-coordinates + square of difference of y-coordinates

Length of AB = √ 0+4 = 2unit

Perimeter of Square of ABCD = 8 units

area of Square ABCD = 4 square units

Length of KL = √0+2 = √2 units

Perimeter of Square KLMN= 4√2 units

Area of Square KLMN= 2 square units

Ratio of ( new to original) of perimeter = 4√2/8 = 1/√2

Ratio of ( new to original) of area = 2/4 = 1/2

To learn more about dilation , refer :

brainly.com/question/3123885

#SPJ4

3 0

2 years ago

Christmas: Multi Step Equations Escape

ruslelena [56]

Answer:

h

Step-by-step explanation:

gggj gj

6 0

3 years ago

In a large sample of customer accounts, a utility company determined that the average number of days between when a bill was sen

ludmilkaskok [199]

Answer:

Question 1: between 25 and 39 days

Question 2: about 95%

Question 3: about 99.7%

Explanation:

Question 1. Between what two values will approximately 68% of the numbers of days be?.

You can answer based on the 68-95-99.7% rule. As per this rule, about 68% of the data of a normal distribution (bell shaped) are within one standard deviation of the mean.

Here the mean is 32 day and the standard deviation is 7 day. Then 68% are in the interval 32 days ± 7 days.

That is:

32 days + 7 days = 39 days

32 days - 7 days = 25 days

Consequently, approximately 68% of the numbers of days will be between 25 and 39 days.

Question 2. Estimate the percentage of customer accounts for which the number of days is between 18 and 46.

First must determine the Z-scores both both values X = 18 and X = 46

The formula is:

$Z-score = (X-mean)/(standard\text{ }deviation)$

For X = 18

$Z-score=(18-32)/7=-2$

For X = 46

$Z-score=(46-32)/7=2$

Hence, you want to estimate the percentage of customers accounts for which the the number of days is within 2 standard deviations of the mean.

As per the 68-95-99.7 rule about 95% of the data are within 2 standard deviations of the mean. You can calculate it also from a standard normal distribution table, finding the area to the left of Z-score = - 2 and subtracting the area to the right of Z-score equal to 2: That is: 0.9772 - 0.0228 = 0.9484 = 95.44% ≈ 95%.

Question 3. Estimate the percentage of customer accounts for which the number of days is between 11 and 53.

Again, determine the Z-scores for the two values, X = 11 and X = 53.

For X = 11:

$Z-score=(11-32)/7=-3$

For X = 53:

$Z-score=(53-32)/7=3$

Hence, you want to estimate the probability of the number of days s between - 3 and 3 standard deviations.

Such probability is about 99.7%, according to the 68-95-99.7 rule.

If you use a standard distritution table you will find that the area to the right of the Z-score of -3 is 0.99865, thus the probability of the Z-score be to the right of 3 is 1 - 0.99865 = 0.00135.

And the probability in between -3 and 3 standard deviations is 0.99865 - 0.00135 = 0.9973 = 99.73% ≈ 99.7%.

6 0

3 years ago

I need an answer for this please.

Vanyuwa [196]

Answer:

N0O0O0O0O0O0O0O0O0O0O

Step-by-step explanation:

8 0

3 years ago