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2 years ago

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!Which expression is equal to 5/13√ ?

Mathematics

2 answers:

Anvisha [2.4K]2 years ago

7 0

$\dfrac{5}{\sqrt{13}}\cdot\dfrac{\sqrt{13}}{\sqrt{13}}=\dfrac{5\sqrt{13}}{13}$

$\text{Used:}\ \sqrt{a}\cdot\sqrt{a}=a$

Mariana [72]2 years ago

5 0

Answer:

5√13 / 13

Step-by-step explanation:

If we have the expression:

5 / √13

We can only change the way it is expressed by multiplying it by 1 to not change the value and we know that1 is the same as a number divided by the same number:

In this case, we are going to multiply the expression by √13 / √13 which is equal to 1:

(5 / √13) * (√13 / √13)

Solving we get:

5*√13 / √13*√13

5*√13 / √13²

5*√13 / 13

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2 years ago

67% of owned dogs in the United States are spayed or neutered. Round your answers to four decimal places. If 48 owned dogs are r

oksian1 [2.3K]

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b) Probability that at most 33 of them are spayed or neutered = 0.66

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Step-by-step explanation:

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probability of having a dog that is not spayed or neutered, q = 1 - 0.67

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sample size, n = 48

According to binomial distribution formula:

$P(X=r) = nCr p^r q^{n-r}$

where $nCr = \frac{n!}{(n-r)! r!}$

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$P(X= 29) = 48C29 * 0.67^{29} * 0.23^{19}\\P(X=29) = 0.074$

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$P(28 \leq X \leq 33) = P(X=28) + P(X=29) + P(X=30) + P(X=31) + P(X=32) + P(X=33)\\P(28 \leq X \leq 33) = 0.053 + 0.074 + 0.095 + 0.112 + 0.121 + 0.119\\P(28 \leq X \leq 33) = 0.574$

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