15PTS PLEASE HELP ASAP!
(dont write random answers pls)
look at the pic attached:

Answer:

a) 68%

b) 99.7%

c) 95%

Step-by-step explanation:

The mean height for an 8th grader in the State of Florida is 146 cm with a standard deviation of 8 cm. Given a normal distribution, use the Empirical Rule to interpret the data.

Empirical rule states that:

68% of data falls within 2 standard deviations from the mean - between μ – σ and μ + σ .

95% of data falls within 2 standard deviations from the mean - between μ – 2σ and μ + 2σ .

99.7% of data falls within 3 standard deviations from the mean - between μ - 3σ and μ + 3σ .

Mean = 146

Standard deviation = 8cm

a) What percent of 8th graders heights are between 138 cm and 162 cm?

146 - sx = 138cm

146 - 138 cm = 8cm

146 - 162 cm = 8cm

Hence,68% of data falls within 2 standard deviations from the mean - between μ – σ and μ + σ .

b) What percent of 8th graders heights are between 122 cm and 170 cm?

Standard deviation = 8

146 - 122 = 24 cm

146 - 170 = -24cm

24cm/8 cm = 3

Hence,99.7% of data falls within 3 standard deviations from the mean - between μ - 3σ and μ + 3σ .

c) What percent of 8th graders heights are between 130 cm and 162 cm?

146 cm - 130cm = 16cm

162 cm - 146 cm = 16 cm

16cm/8cm

= 2

Hence, 95% of data falls within 2 standard deviations from the mean - between μ – 2σ and μ + 2σ .

Answer: 44/7

Step-by-step explanation:     Hope it helps pls give brainliest

6 2/7= ?/7

multiply 6 by 7

= 6 2/7= 42/7

add 42 and 2= 44

= 44/7

The given mixed number 6 2/7 expressed as an improper fraction is 44/7.

The given mixed numbers s as follows:

6 2/7

To convert the mixed number 6 2/7 to an improper fraction, we can follow these steps:

Multiply the whole number (6) by the denominator (7).

⇒ 6 x 7 = 42

Add the product from Step 1 to the numerator (2).

⇒ 42 + 2 = 44

Write the sum from Step 2 as the new numerator over the denominator (7).

The improper fraction equivalent of 6 2/7 is 44/7.

Therefore, 6 2/7 expressed as an improper fraction is 44/7.

Learn more about the fraction here:

brainly.com/question/10354322

#SPJ6

its b

Step-by-step explanation:

Each calculator would cost 30 dollars (sorry if this isn't what you mean)

Answer:

1.118 3 ¯ repeating   ⋅ 10 exponent  7

Step-by-step explanation:

Answer:

abortion is like killing a baby as a mother

Step-by-step explanation:

simile uses "like" or "as"

Answer:

1 = 40

2 = 140

3 = 40

4 = 140

5 = 40

6 = 140

7 = 40

Step-by-step explanation:

A straight line is 180 so I did 40 because 140 + 40 = 180. once I figured 3 out I basically had the rest.

Answer:

none of the above

Step-by-step explanation

70x + 300 = 90x

          300 = 20x

             15 = x

Answer:

each must travel 15 miles, and the charge is $13.50

Step-by-step explanation:

a8ex

Answer:

the last one

Step-by-step explanation:

Answer:

Sure what's the problem. I don't see a problem or an attachment  

Step-by-step explanation:

Answer:

One thing that I watch almost everyday that can help me understand proportional relationships is ads after I've watched an important event of the show. For example, I've just watched a good episode of {Show Name} and an ad about Shoprite appears. A graph, with a red line shows you how many people prefer to go to their shop than Walmart. They put their numbers in bigger numbers, making it seem that a lot of people go there compared to Walmart, so it must be good. This involves understanding proportional relationships because it shows how many people show up to Shoprite in {number of weeks}. So, the more weeks that Shoprite shows their ad, that more people come in that week.

Step-by-step explanation:

You have to think about x and y axis, and compare it to real life situations. For example, You're pouring gas into your car. The x axis is how many gallons of gas you poured in and the y is how much money you spent. The more you pour in gallons of gas, the more money you spend.

So, now all you have to do it compare it to something you do everyday.

Please don't copy this, we are in the same class. :(

Answer:

b. 1

Step-by-step explanation:

you lised m = 12 and n = 1/4 so...

1/2(12-4) x 1/4

4 x 1/4 = 4/4 = 1

Answer:

e4 squared

Step-by-step explanation:

Answer:

6.2 yards

Step-by-step explanation:

Answer:

1, 4, 5

Step-by-step explanation:

rational is when there is an end to the number.

Answer:

15

Step-by-step explanation:

just took the test. x=5 and the answer to the equation is 15

Answer: 1350 ft^2

Step-by-step explanation:

The total square footage of the home will be equal to the sum of the areas of each floor.

We know that the ground floor is 25 ft by 30ft,  which can be thought of as a rectangle with a length of 25ft and a width of 30 ft.

We know that te area of a rectangle of width W and length L is:

A = L*W

then the area of the ground floor is:

A = 25ft*30ft = 750 ft^2

And the second floor is 20ft by 30ft, then using the same approach as above, the area of the second floor will be:

A = 20ft*30ft = 600ft^2

Then the total square footage of the home is:

SF = 750ft^2 + 600ft^2 = 1350 ft^2

The total square footage of the home will be 1350 feet².

Based on the information given, the area of the first floor will be:

= 25 × 30

= 750 feet²

The area of the second floor will be;

= 20 × 30

= 600 feet ²

The total square footage will be:

= 750 + 600

= 1350 feet ²

Read related link on:

https://brainly.com/question/20360160

Answer:

x=36

Step-by-step explanation:

By vertical angles we know that

[tex]72 = 2x\\\\x=\frac{72}{2}\\\\x=36[/tex]

Answer:

x = 36

Step-by-step explanation:

72 and 2x are vertical angles, so they are equal.

2x = 72

2x/2 = 72/2

x = 36

Answer:

3x=4x-24, x=24, RST=72

I will be doing more 100 point free questions

Answer:

Austin will have to pay $33,750 for the simple interest.

Step-by-step explanation:

2.25% into decimal = 0.0225

0.0225 x 3000 = 6750

6750 x 5 = 33750

Answer:

3 divided by 2 is 1.5

1/4 divided by 3/8 is 1/8

Step-by-step explanation:

Answer:

20*3 1/5

3 1/5= 15+1=16

16/3*20

320/3=

106 1/3

Answer:

64 is ur answer

Step-by-step explanation:

3 1/5 is equal to 16/5

20/1 x 16/5

320/5 = 64

Answer:

i do believe they are right, i got b too.

Step-by-step explanation:

Answer:

16

Step-by-step explanation:

Answer:

21 comics

Step-by-step explanation:

hope this helped:)

Answer:

The first one

Step-by-step explanation:

A direct variation is when x and y are multiplied or divided by the same number. For example, in the first one y is always 8 times x. But, in the 2nd 3rd and 4th one that is not the case.

Hope this Helps!!! :)

Let me know in the comments if I should change anything or if the answer was perfect!!!

Answer:

B

Step-by-step explanation:

Answer:

Just interest is $187.50

Total is $2,687.50

Step-by-step explanation:

1. Determine what 7.5% of $2,500 is:

0.075 × 2,500 = 187.5

2. Add the interest (187.5) to the amount invested:

2,500 + 187.5 = 2,687.5

Answer:

375 interest, 2875 total

Step-by-step explanation:

I - ?

P - 2,500

R - .075

T - 2

2,500 x .075 = 187.5

187.5 x 2 = 375

375 + 2,500 = 2,875

(Do you go to GPFAA bc I have the same question)