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3 years ago

What is the answer of 2 1/3 - 2/3 and an estimate pls

Mathematics

1 answer:

Lubov Fominskaja [6]3 years ago

4 0

Answer:

$\frac{5}{3}$ or 1.7 as a decimal (1.6 repeating)

Step-by-step explanation:

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Running times for 400 meters are Normally distributed for young men between 18 and 30 years of age with a mean of 93 seconds and

Luda [366]

Answer:

C. 45 and 141 seconds

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 93 seconds

Standard deviation = 16 seconds

99.7% of running times are approximately between:

By the Empirical rule, within 3 standard deviations of the mean, so between 3 standard deviations below the mean and 3 standard deviations above the mean

3 stnadard deviations below the mean

93 - 3*16 = 45 seconds

3 standard deviations above the mean

93 + 3*16 = 141 seconds

The correct answer is:

C. 45 and 141 seconds

3 0

3 years ago

You have $120 in your checking account. In one month, you deposit $30, write a check for $21, withdraw $20, and deposit $45. Fin

gizmo_the_mogwai [7]

Answer:

Your total balance is 154.

Step-by-step explanation:

You start with 120.

+30

-21

+45

Hope that helps.

4 0

3 years ago

Read 2 more answers

What are the turning points of the function f(x)=x^3+9x^2+24x+16?

Lana71 [14]

???????????????????????

3 0

4 years ago

Mrs. Lin is sewing costumes for her grandchildren. She is making three lion costumes, one zebra costume, and two bear costumes.

stepladder [879]

Answer:

$12\frac{1}{8}\ yd$

Step-by-step explanation:

we know that

The total fabric that Mrs. Lin needs is equal to

$3(1\frac{2}{3})+2\frac{5}{8}+2(2\frac{1}{4})$

Convert mixed number to an improper fraction

$1\frac{2}{3}=1+\frac{2}{3}=\frac{5}{3}$

$2\frac{5}{8}=2+\frac{5}{8}=\frac{21}{8}$

$2\frac{1}{4}=2+\frac{1}{4}=\frac{9}{4}$

substitute

$3(\frac{5}{3})+\frac{21}{8}+2(\frac{9}{4})$

$5+\frac{21}{8}+\frac{9}{2}$

$\frac{40+21+36}{8}=\frac{97}{8}\ yd$

Convert to mixed number

$\frac{97}{8}\ yd= \frac{96}{8}+\frac{1}{8}=12\frac{1}{8}\ yd$

4 0

4 years ago

(3) There are 2 mixtures of light purple paint. Mixture A is made with 5 cups of

ivann1987 [24]

Answer:

Mixture A

Step-by-step explanation:

besause it uses less portion of white paint

6 0

3 years ago