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Mathematics

1 answer:

Advocard [28]2 years ago

3 0

Answer:

KE=112 $\frac{kg * m^{2} }{s^{2} }$

Step-by-step explanation:

Kinetic Energy (KE) = (1/2)*mass*v^2

KE=(1/2)*.14*40^2

KE=112 $\frac{kg * m^{2} }{s^{2} }$

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3 years ago

Solve rational exponents x2/3=16

miv72 [106K]

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Henry has collected data to find that the typing speeds for the students in a typing class has a normal distribution. What is th

Mekhanik [1.2K]

Answer: 0.8413

Step-by-step explanation:

Given : Henry has collected data to find that the typing speeds for the students in a typing class has a normal distribution.

Mean : $\mu=47$

Standard deviation : $\sigma= 4$

Let x be the random variable that represents the typing speeds for the students.

The z-score :-

$z=\dfrac{x-\mu}{\sigma}$

For x= 51

$z=\dfrac{51-47}{4}=1$

Using the standard normal distribution table ,the probability that a randomly selected student has a typing speed of less than 51 words per minute :-

$P(x$