MATHEMATICS MIDDLE SCHOOL

Fuel economy estimates for automobilos built in a certain yoar predicted a mean of 26.8 mpg and a standard deviation of 72 mpg for highway driving. Assume that a normal distribution can be applied. Within whatrange are 99.8% of the automobiles?

Answers

Answer 1
Answer:

Answer:

range=u ± 3.09 sd

Step-by-step explanation:

Given:

mean, u= 26.8 mpg

standard deviation, sd=72 mpg

% contained in interval = 99.8%

the interval for 99.8% of the values of a normal distribution is given by

mean ± 3.09 standard deviation= u ± 3.09 sd

                                                      =26.8  ± 3.09(72)

                                                      =26.8 ± 222.48

                                                      = 249.28 , -195.68

range=u ± 3.09 sd = 249.28 , -195.68 !

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Answers

Answer:

The answer is 300 one’s

Answer:

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Step-by-step explanation:

Dave can paint the office by himself in 4 hours. Working with an associate, he can paint theoffice in 3 hours. How long would it take his associate to do it working alone?

Answers

Answer:

It would take 12 hours for his associate to do the complete work alone.

Step-by-step explanation:

Let 'x' be the hours taken by his associate working alone.

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PLS ANSWER
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Answers

True, Fe (iron) has 2 on the left side and on the other side as well. C (carbon) has 3 on the left and 3 on the other. O (oxygen) has 6, 3 for the first part and another 3 because of the reciprocal in the beginning of the equation. On the other side O has 2 and it's multiplied by the reciprocal 3 which is 6

What is 5 1/2 divided by 3/4?
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Answers

5(1)/(2):(3)/(4)=(5\cdot2+1)/(2):(3)/(4)=(11)/(2)\cdot(4)/(3)=(11)/(1)\cdot(2)/(3)=(11\cdot2)/(3)=\boxed{(22)/(3)=7(1)/(3)}
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Find the area of the polygon with vertices K (-2,4), L (6,-2), M (4,-4), and N (-6, -2)

Answers

Answer:

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Step-by-step explanation:

Karen bakes cookies. she has observed that the number of cookies m that turn out well in each batch varies with the size of the batch and is given by the function f(x)= 2x-23 where c is the size of the batch (number of cookies in each batch). she never bakes fewer than 12 cookies in a batch. if the size of 5 batches is {20,25,26,27,34}, how many cookies turn out well in each batch?

Answers

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