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3 years ago

A cooler holds 15 liters of water. About how many gallons does it hold?

Mathematics

2 answers:

Vera_Pavlovna [14]3 years ago

6 0

Divide 15 by 3.79 to get your answer.

$\frac{15}{3.79} = 3.9$

The answer is 3.9 gallons, or you could round to 4.

lord [1]3 years ago

4 0

Answer:

Step-by-step explanation:

The cooler holds 15 liters of water

Give: 1 gallon ≈ 3.79 liters

15 liters of water has how many gallons?

Cross multiplying gives approximately:

(15 × 1) ÷ 3.79 = 3.957783641 gallons = 4 gallons rounded up to nearest gallon.

The cooler holds about 4 gallons.

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A research company desires to know the mean consumption of meat per week among people over age 40. A sample of 610 people over a

Papessa [141]

Answer: $(3.0,\ 3.2)$

Step-by-step explanation:

Confidence interval for population mean is given by :-

$\overline{x}\pm z_{\alpha/2}\dfrac{\sigma}{\sqrt{n}}$ (1)

, where $\overline{x}$ = Sample mean

$z_{\alpha/2}$ = Critical z-value

$\sigma$ = Population standard deviation.

n= Sample size.

As per given , we have

n= 610

$\sigma=1.1$

$\overline{x}=3.1$

Significance level for 85% confidence : $\alpha=1-0.85=0.15$

By z-table critical two tailed z-value : $z_{\alpha/2}=z_{0.075}=1.44$

Put all values in (1) , we get

$3.1\pm 1.44\dfrac{1.1}{\sqrt{610}}$

$3.1\pm 1.44\dfrac{1.1}{24.698}$

$3.1\pm 0.064$

$=(3.1-0.064,\ 3.1+0.064)=(3.036,\ 3.164)\approx(3.0,\ 3.2)$

Hence, the 85% confidence interval for the mean consumption of meat among people over age 40. = $(3.0,\ 3.2)$

5 0

3 years ago

It is telling me to use compatible numbers to estimate the percent of 19% of 30

nexus9112 [7]

19% of 30

19 / 30 = 5.7

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3 years ago

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olchik [2.2K]

Answer:

The circumference and area of a circle with a 17 ft diameter are:

C = 53.4 ft

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3 years ago

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GarryVolchara [31]

Answer:

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2 years ago

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AVprozaik [17]

Answer:

The answer is 25%

Step-by-step explanation:

150-120=30

30 divided by 120=0.25

0.25 times 100 (because percents are of 100)= 25%

formula: ([b-a)/a]x100

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3 years ago