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3 years ago

A pair of sneakers cost the store $65. They mark them up by 40%. What is the selling price of the sneakers?

Mathematics

2 answers:

nadezda [96]3 years ago

5 0

The selling price is $91

Elina [12.6K]3 years ago

4 0

Answer:

Step-by-step explanation:

40% of 65 is 26. 26 + 65 = 91

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Oksanka [162]

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Step-by-step explanation:

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3 years ago

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Sedbober [7]

Answer:

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Step-by-step explanation:

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3 0

3 years ago

Scores on a certain intelligence test for children between ages 13 and 15 years are approximately normally distributed with μ=10

Tju [1.3M]

Answer: 0.8238

Step-by-step explanation:

Given : Scores on a certain intelligence test for children between ages 13 and 15 years are approximately normally distributed with $\mu=106$ and $\sigma=15$ .

Let x denotes the scores on a certain intelligence test for children between ages 13 and 15 years.

Then, the proportion of children aged 13 to 15 years old have scores on this test above 92 will be :-

$P(x>92)=1-P(x\leq92)\\\\=1-P(\dfrac{x-\mu}{\sigma}\leq\dfrac{92-106}{15})\\\\=1-P(z\leq })\\\\=1-P(z\leq-0.93)=1-(1-P(z\leq0.93))\ \ [\because\ P(Z\leq -z)=1-P(Z\leq z)]\\\\=P(z\leq0.93)=0.8238\ \ [\text{By using z-value table.}]$

Hence, the proportion of children aged 13 to 15 years old have scores on this test above 92 = 0.8238

4 0

3 years ago