All categories

3 years ago

Do not answer if you are unsure.

Mathematics

1 answer:

pishuonlain [190]3 years ago

3 0

Answer:

D. 5

Step-by-step explanation:

Mean: (50+60)/2

110/2

Margin of error:

60 - 55

You might be interested in

If a math problem asks 3/4 the size of something do u multiply

galben [10]

Answer:

yeah

Step-by-step explanation:

explaining this is not fun but yes you lultiply

5 0

3 years ago

The variance of a sample of 144 observations equals 576. the standard deviation of the sample equals?

elena55 [62]

When the variance of a sample of 144 observation is 576 then, the standard deviation of the sample equals 24

The variance is a measure of variability. It is calculated by taking the average of squared deviations from the mean. Variance tells you the degree of spread in your data set

Standard deviation is a statistic that measures the dispersion of a dataset relative to its mean and is calculated as the square root of the variance.

Given,

The number of samples = 144

The variance = 576

The standard deviation is the square root of variance

The standard deviation = $\sqrt{576}$ =24

Hence, when the variance of a sample of 144 observation is 576 then, the standard deviation of the sample equals 24

Learn more about Standard deviation here

brainly.com/question/16555520

#SPJ4

5 0

2 years ago

Is triangle ABC ~triangle PQR ? support your answer with a theorem or a posture

Katarina [22]

Answer:

Step-by-step explanation:

Where the image at

8 0

3 years ago

Denise rolled a number cube several times. The results are shown.

strojnjashka [21]

4/156 so
2/78 so
1/39 so approx. 2.5641%

5 0

3 years ago

Read 2 more answers

PLEASE HELP

Tems11 [23]

QUESTION A

The given multiplication problem is

$\frac{39}{64} \times \frac{8}{13}$

Factor each term to obtain;

$\frac{13\times 3}{8\times8} \times \frac{8}{13}$

Cancel out the common factors to obtain;

$\frac{1\times 3}{8\times1} \times \frac{1}{1}$

Simplify to get;

$\frac{3}{8}$

QUESTION B

The given multiplication problem is

$\frac{2}{3}\times \frac{1}{5}\times \frac{4}{7}$

This the same as

$\frac{2\times 1\times 4}{3\times 5\times 7}$

This simplifies to;

$\frac{8}{105}$

QUESTION C

The given problem is

$\frac{3}{5}\times \frac{10}{12} \times \frac{1}{2}$

This is the same as

$\frac{3}{5}\times \frac{5}{6} \times \frac{1}{2}$

$=\frac{1}{1}\times \frac{1}{2} \times \frac{1}{2}$

This simplifies to

$=\frac{1}{4}$

QUESTION D.

The given expression is

$\frac{4}{9}\times 54$

Factor the 54 to obtain;

$\frac{4}{9}\times 9\times 6$

Cancel the common factors to get;

$\frac{4}{1}\times 1\times 6$

This simplifies to;

$=24$

QUESTION E

The given problem is

$20\times 3\frac{1}{5}$

Convert the mixed numbers to improper fraction to obtain;

$=20\times \frac{16}{5}$

$=4\times5 \times \frac{16}{5}$

Cancel the common factors to get;

$=4\times1 \times \frac{16}{1}$

$=64$

QUESTION F

The multiplication problem is

$11 \times 2 \frac{7}{11}$

Convert the mixed numbers to improper fractions to obtain;

$11 \times \frac{29}{11}$

Cancel out the common factors to get;

$=1 \times \frac{29}{1}$

Simplify;

$=29$

QUESTION G

The given problem is

$5\frac{1}{3}\times 5\frac{1}{8}$

Convert to improper fractions;

$=\frac{16}{3}\times \frac{41}{8}$

Cancel out the common factors to get;

$=\frac{2}{3}\times \frac{41}{1}$

$=\frac{82}{3}$

Convert back to mixed numbers

$=27\frac{1}{3}$

QUESTION H

The given expression is

$10\frac{2}{3} \times 1\frac{3}{8}$

Convert to improper fraction to get;

$\frac{32}{3} \times \frac{11}{8}$

Cancel common factors to get;

$=\frac{4}{3} \times \frac{11}{1}$

Simplify

$=\frac{44}{3}$

Convert back to mixed numbers;

$=14\frac{2}{3}$

7 0

3 years ago