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3 years ago

Oscar rides his skateboard 5/8 mile in 1/4 hour How fast in a mile per hour does he ride his skateboard

Mathematics

2 answers:

SIZIF [17.4K]3 years ago

6 0

He is riding at 2.5 mph

Salsk061 [2.6K]3 years ago

6 0

Answer:

His rides with speed 2.5 miles per hour.

Step-by-step explanation:

Given,

Oscar rides his skateboard 5/8 mile in 1/4 hour,

⇒ The distance covered by him in 1/4 hours = 5/8 miles,

Thus, the distance covered by him in 1 hours = $4\times \frac{5}{8}$

$=\frac{20}{8}$

$=2.5\text{ miles}$

Hence, his speed is 2.5 miles per hour.

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Answer:

15 $\sqrt{5}$

Step-by-step explanation:

$3\sqrt{125}=3\sqrt{25*5}\\ =3\sqrt{25}*\sqrt{5}\\ =3*5*\sqrt{5}\\ =15\sqrt{5}$

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2 years ago

A quality control expert at Glotech computers wants to test their new monitors. The production manager claims they have a mean l

tankabanditka [31]

Answer:

The probability that the mean monitor life would be greater than 96.3 months in a sample of 84 monitors

P(X⁻ ≥ 96.3) = 0.0087

Step-by-step explanation:

Step(i):-

Given that the mean of the Population = 95

Given that the standard deviation of the Population = 5

Let 'X' be the random variable in a normal distribution

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Given that the size 'n' = 84 monitors

Step(ii):-

The Empirical rule

$Z = \frac{x^{-} -mean}{\frac{S.D}{\sqrt{n} } }$

$Z = \frac{96.3 - 95}{\frac{5}{\sqrt{84} } }$

Z = 2.383

The probability that the mean monitor life would be greater than 96.3 months in a sample of 84 monitors

P(X⁻ ≥ 96.3) = P(Z≥2.383)

= 1- P( Z<2.383)

= 1-( 0.5 -+A(2.38))

= 0.5 - A(2.38)

= 0.5 -0.4913

= 0.0087

Final answer:-

The probability that the mean monitor life would be greater than 96.3 months in a sample of 84 monitors

P(X⁻ ≥ 96.3) = 0.0087

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2 years ago

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Step-by-step explanation:

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2 years ago

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