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2 years ago

When Miguel does 16 push-ups and 12 sit-ups, it takes a total of 72

Mathematics

2 answers:

antoniya [11.8K]2 years ago

8 0

Answer:

4.5 or 5.2

approximately 5

Step-by-step explanation:

$since \: it \: took \: \\ 72 \: seconds \: to \: do \: 16 \: push \: ups \\ 72 \div 16 = 4.5 \: approximately \: \\ = 5 \: seconds\: per \: push \: up \\ 2nd \: comparison \: \\ 57 ÷ 11 = \\ 5.8111111 \\ = 5.2(to \: 1 \: decimal) \\ approximately \: \\ 5 \\ \: so \: it \: takes \: 5 \: seconds$

Mars2501 [29]2 years ago

5 0

Answer:

about 3 seconds

Step-by-step explanation:

hope this helps

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deff fn [24]

Exponential notation allows the representation of numbers in shorter form.
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2 years ago

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An article in the November 1983 Consumer Reports compared various types of batteries. The average lifetimes of Duracell Alkaline

Allushta [10]

Answer:

The mean is of -0.4 hours.

Step-by-step explanation:

To solve this question, we need to understand the central limit theorem and subtraction of normal variables.

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Subtraction between normal variables:

When two normal variables are subtracted, the mean is the difference of the means, while the standard deviation is the square root of the sum of the variances.

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Mean of the sample of 64 Eveready:

By the Central Limit Theorem, 4.5 hours.

Mean of the difference?

Subtraction of normal variables, so we subtract the means.

4.1 - 4.5 = -0.4

The mean is of -0.4 hours.

8 0

2 years ago

I don't understand the bottom with 1/2= and 0.48=! It says find the corresponding equivalent for either the decimal or fraction

zepelin [54]

So basically, you have to find the decimal that equals 1/2 and the fraction that equals 0.48, but it has to be in simplest form. If you divide 1 by 2, you get 0.5, which would be the answer to 1/2=. For 0.48=, you would start by putting 48 over 100 because if you read the decimal aloud, it is 48 hundredths and 0.48 goes to the hundredths place. Then, you would begin to simplify 48/100. A common divisor for those 2 numbers is 2, but you could also use 4. I am going to use 4, so 48/100=12/25. Now that you have the fraction 12/25, look to see if there are any common factors. There are none, so 0.48=12/25.
Hope this helps!! :)

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3 years ago

a gym membership costs $25 to join and $14 each month. Write and use and algebraic expression to find the cost of the membership

Klio2033 [76]

So the equation format you will be using is y=mx+b. m = slope and b = y int.
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3 years ago

A man drove 14 mi directly east from his home, made a left turn at an intersection, and then traveled 8 mi north to his place of

Gnoma [55]

Answer:

16m

Step-by-step explanation:

Download docx

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2 years ago