In what ways are products of fractions similar to products of integers?

Mathematics

1 answer:

zhannawk [14.2K]3 years ago

3 0

Answer:

Step-by-step explanation:

Products of fractions can be similar to products of integers because the product of the fraction can cancel out or simplify to an integer. For example:

1/2 x 2/1

Any number multiplied by its reciprocal is equal to 1.

The same rules for multiplying positive and negative integers still applies to multiplying positive and negative fractions.

Hope this helps!! :)

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Answer:

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When two customers enter the store together, what is the probability that at least one of them will make a purchase?

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The probability is 1/2 or 50%.

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Write the first 5 terms of the arithmetic sequence if the nth term is given by 25+(n-1)(7)

ivann1987 [24]

Here, Just substitute the value of n,
a(1) = 25 + (1-1)(7) = 25
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In short, Your Sequence would be 25, 32, 39, 46, 53

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3 years ago

Crash testing evaluates the ability of an automobile to withstand a serious accident. A simple random sample of 12 small cars we

morpeh [17]

Answer:

The 95% confidence interval for the difference between proportions is (-0.046, 0.713).

Step-by-step explanation:

We want to calculate the bounds of a 95% confidence interval.

For a 95% CI, the critical value for z is z=1.96.

The sample 1 (small cars), of size n1=12 has a proportion of p1=0.6667.

$p_1=X_1/n_1=8/12=0.6667$

The sample 2, of size n2=15 has a proportion of p2=0.3333.

$p_2=X_2/n_2=5/15=0.3333$

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The estimated standard error of the difference between means is computed using the formula:

$s_{p1-p2}=\sqrt{\dfrac{p(1-p)}{n_1}+\dfrac{p(1-p)}{n_2}}=\sqrt{\dfrac{0.4815*0.5185}{12}+\dfrac{0.4815*0.5185}{15}}\\\\\\s_{p1-p2}=\sqrt{0.0208+0.0166}=\sqrt{0.0374}=0.1935$