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3 years ago

10

Taylor uses 645.6 gallons of water in 7 days. Suppose he uses the same amount of water each day. About how much water does taylo

r use each day?

2 answers:

ahrayia [7]3 years ago

4 0

About 92.2 gallons a day

jenyasd209 [6]3 years ago

3 0

<span>92.23 Gallons per day. Because you divide 645.6 by 7, so that you can calculate the daily usage. :) </span>

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A manufacturer knows that their items have a normally distributed length, with a mean of 14.2 inches, and standard deviation of

netineya [11]

The probability that it is less than 11.9 inches long will be 0.11304.

<h3>What is the z-score?</h3>

The z-score is a statistical evaluation of a value's correlation to the mean of a collection of values, expressed in terms of standard deviation.

The z-score is given as

z = (x - μ) / σ

Where μ is the mean, σ is the standard deviation, and x is the sample.

A manufacturer knows that their items have a normally distributed length, with a mean of 14.2 inches, and standard deviation of 1.9 inches.

If one item is chosen at random.

Then the probability that it is less than 11.9 inches long will be

Then the z-score will be

z = (11.9 – 14.2) / 1.9

z = –1.21

Then the probability will be

P(x < 11.9) = P(z < –1.21)

P(x < 11.9) = 0.11304

More about the z-score link is given below.

brainly.com/question/15016913

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4 0

2 years ago

Jonathan’s class has 30 boys. Of the students in his class, 60% are girls. How many girls are in Jonathan’s class?

raketka [301]

Answer:

45 girls

Step-by-step explanation:

Remark
There are only 2 choices for gender. So if the class is 60% girls, the there must be 100 - 60 = 40% for the boys.
But we are told that the boys are 30 in number.
Let x = the total number of students.

Solution

40/100 * x = 30 Change the % to a decimal
0.4 x = 30 Divide both sides by 0.4
0.4 x / 0.4 = 30 / 0.4 Do the division
x = 30/0.4
x = 75 students in total

Formula

Total of Boys and Girls = Number of boys + number of girls.

Givens

Total = 75
Number of boys = 30

Solution II

75 = x + 30 Subtract 30 from each side
75 - 30 = x +30 - 30
45 = x
There are 45 girls in the class.

5 0

4 years ago

Subtract 9x^2-7x9x <br> 2<br> −7x from -4x^2+6−4x <br> 2<br> +6.

levacccp [35]

Answer:

18x^2+7x+12

Step-by-step explanation:

Some signs were left out so I did my best to guess what you left out. If you want a definite answer comment and I'll answer it. Please use * for multiplication

3 0

3 years ago

Y=f(x) = 8^x find f(x) when x= 1/3

lilavasa [31]

the correct answer for plato users is

2!!

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3 years ago

Select all the ratios that are equivalent to the ratio 12:3. explain how you know( show multiplication or division)

grigory [225]

Answer:

C 4:1

D 24:6

F 1200:300

Step-by-step explanation:

The given ratio is $\frac{12}{3}$

Simplify

Divide by 3 both numerator and denominator

$\frac{4}{1}$

<u><em>Verify each case</em></u>

case A) we have

$\frac{6}{1}$

Compare with the given ratio

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

therefore

The ratio is not equivalent

case B) we have

$\frac{1}{4}$

Compare with the given ratio

$\frac{1}{4} \neq \frac{4}{1}$

therefore

The ratio is not equivalent

case C) we have

$\frac{4}{1}$

Compare with the given ratio

$\frac{4}{1}=\frac{4}{1}$

therefore

The ratio is equivalent

case D) we have

$\frac{24}{6}$

Simplify

Divide by 6 both numerator and denominator

$\frac{4}{1}$

Compare with the given ratio

$\frac{4}{1}=\frac{4}{1}$

therefore

The ratio is equivalent

case E) we have

$\frac{15}{6}$

Simplify

Divide by 3 both numerator and denominator

$\frac{5}{2}$

Compare with the given ratio

$\frac{5}{2} \neq \frac{4}{1}$

therefore

The ratio is not equivalent

case F) we have

$\frac{1,200}{300}$

Simplify

Divide by 300 both numerator and denominator

$\frac{4}{1}$

Compare with the given ratio

$\frac{4}{1}=\frac{4}{1}$

therefore

The ratio is equivalent

case G) we have

$\frac{112}{13}$ ----> irreducible

Compare with the given ratio

$\frac{112}{13} \neq \frac{4}{1}$

therefore

The ratio is not equivalent

3 0

3 years ago