Squash:

21 acres

12 acres

Which expression is equivalent to the sum of the two areas?

3/4 + 7) acres

7(3+4) acres

4(3+ 7) acres

3(3+ 7) acres

Plz answer!

Answer:

**Answer:**

it is A hope this helps

**Step-by-step explanation:**

I just took the test

Answer:

**Answer: its a **

**Step-by-step explanation:**

itook the test

Find each missing length to the nearest tenth.

An educational psychologist wants to test whether a new teaching method negatively affects reading comprehension scores. She randomly selects 30 6th grade students that were taught under the new teaching method and finds that their scores on a standardized reading comprehension test have a mean equal to 118.8 with a variance equal to 37.2. Scores on the standardized test in the general population of 6th graders are distributed approximately normally with a mean equal to 119.8. Is there sufficient evidence to conclude that the new teaching method negatively affects reading comprehension scores

The state department of transportation is coordinating road crews to fix potholes after a particularly snowy winter. Initial estimates gave an average of 7.8 potholes per mile of highway. Find the probability that there are 11 or more potholes in a randomly selected one-mile stretch of highway. Use Excel to find the probability.

Hayley and Tyra had lunch atRuby Tuesday. Their bill was$22.40. If they leave a 15%tip, how much is the tip?

The set of all real numbers x that satisfies -3 < x<14 is given by the following interval notation: [-3,14) True or False?

An educational psychologist wants to test whether a new teaching method negatively affects reading comprehension scores. She randomly selects 30 6th grade students that were taught under the new teaching method and finds that their scores on a standardized reading comprehension test have a mean equal to 118.8 with a variance equal to 37.2. Scores on the standardized test in the general population of 6th graders are distributed approximately normally with a mean equal to 119.8. Is there sufficient evidence to conclude that the new teaching method negatively affects reading comprehension scores

The state department of transportation is coordinating road crews to fix potholes after a particularly snowy winter. Initial estimates gave an average of 7.8 potholes per mile of highway. Find the probability that there are 11 or more potholes in a randomly selected one-mile stretch of highway. Use Excel to find the probability.

Hayley and Tyra had lunch atRuby Tuesday. Their bill was$22.40. If they leave a 15%tip, how much is the tip?

The set of all real numbers x that satisfies -3 < x<14 is given by the following interval notation: [-3,14) True or False?

19.5 feet long because it’s says 2L so the length he puts it at is 13 feet so you times that by 2 and get 26. Then take 65 minus 26 and you get 39, then take 39 divided by 2 and get 19.5 I think that’s the answer that’s what I would do

**Completed question:**

An initial time study resulted in an average observed time of 2.2 minutes per cycle, and a standard deviation of .3 minutes per cycle. The performance rating was 1.20. What sample size, including the 20 observations in the initial study, would be necessary to have a confidence of 95.44 percent that the observed time was within 4 percent of the true value?

**Answer:**

47

**Step-by-step explanation:**

When doing a statistic study, a sample of the total amount must be taken. This sample must be done randomly, and, to be successful, the sample size (n) must be determined, by:

Where Z(α/2) is the value of the standard normal variable associated with the confidence, S is the standard deviation, and E is the precision. The confidence indicates if the study would have the same result if it would be done several times. For a confidence of 95.44, Z(α/2) = 2.

The standard deviation indicates how much of the products deviate from the ideal value, and the precision indicates how much the result can deviate from the ideal. So, if it may vary 4% of the true value (2.2), thus E = 0.04*2.2 = 0.088.

n = [(2*0.3)/0.088]²

n = 46.48

n = 47 observations.

Answer:

660 ways

**Step-by-step explanation:**

we have two numbers in consecutive positions in this question

(1,1) and (2,2)

numbers of ways that (1,1) are in consecutive positions = 6!/2! = 360

number of ways that (2,2) are in consecutive positions = 6!/2! = 360

the permutation of (11),(22),3,4,5 = 5!

**ps:****I ****counted****the****pairs****as****one****each****.**

5! = 120

to get total number of permutations

7!/2!2!

= 5040/4

= 1260

the number of ways that 2 identical digits are not consecutively positioned = 1260-360-360+120

= *660 ways*

0.27 is the decimal representation of 27/100.

.27 or divide 27/100 and you get the same answer

The answer is a I know this because I took the test

5 cards in her hand, how many cards were in the

entire deck?

There were originally 3 cards in the entire deck.

Let's denote the number of cards in the entire deck as \(D\).

Megan divided the deck into 4 equal groups, so each group has cards.

She placed 3 cards in the center, and now she has 5 cards in her hand.

So, the equation representing this situation is:

Now, let's solve for \(D\):

Multiply both sides by 4 to get rid of the fraction:

Subtract \(D\) from both sides:

Divide both sides by 3:

However, the number of cards in a deck must be a whole number, so we round up:

Therefore, there were originally 3 cards in the entire deck.

**Answer: 32**

**Step-by-step explanation: If she had 8 in her had and placed 3 cards down she would have 5 and if there were 8 cards in each group then, 8x4=32**