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cluponka [151]
2 years ago
12

The length of a rectangle is 4 more than its width. The area of the rectangle is 21m2 . What is the measure of the width?

Mathematics
1 answer:
nadezda [96]2 years ago
7 0
The width is 3m because 3*7 is 21m^2. Also they said the length is 4 more than the width (3+4=7)
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6 0
3 years ago
Read 2 more answers
Kelly earns $178.50 in interest on an account that earns simple interest at a rate of 4%. If she kept the money in the account f
Otrada [13]

Answer:

  $892.50

Step-by-step explanation:

The amount of interest earned is given by ...

  I = Prt

Filling in the given values, we have ...

  $178.50 = P·0.04·5

Dividing by 0.20 gives ...

  $178.50/0.20 = P = $892.50

The principal amount in Kelly's account is $892.50.

7 0
2 years ago
A sample is selected from a population with μ = 46, and a treatment is administered to the sample. After treatment, the sample m
Georgia [21]

Answer:

0.5

Step-by-step explanation:

Solution:-

- The sample mean before treatment, μ1 = 46  

- The sample mean  after treatment, μ2 = 48

- The sample standard deviation σ = √16 = 4

- For the independent samples T-test, Cohen's d is determined by calculating the mean difference between your two groups, and then dividing the result by the pooled standard deviation.

                           Cohen's d = \frac{u2 - u1}{sd_p_o_o_l_e_d}

- Where, the pooled standard deviation (sd_pooled) is calculated using the formula:

                          sd_p_o_o_l_e_d =\sqrt{\frac{SD_1^2 +SD_2^2}{2} }

- Assuming that population standard deviation and sample standard deviation are same:

                          SD_1 = SD_2 =  σ = 4

- Then,

                           sd_p_o_o_l_e_d =\sqrt{\frac{4^2 +4^2}{2} } = 4

- The cohen's d can now be evaliated:

                          Cohen's d = \frac{48 - 46}{4} = 0.5

6 0
2 years ago
4.5 - d > 2.5 substitute 2.5 for d
den301095 [7]

Answer:

so whats the question?

Step-by-step explanation:

5 0
2 years ago
The amount in a savings account increased from 200 to 216. What was the percent of increase?
aleksandrvk [35]
216/200=%
1.08 which equals 108%
4 0
3 years ago
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