The probability that a random sample of 12 second grade students results in a mean reading rate of more than 95 words per minute is 0.4582.
Given that the population mean, 
= 90 wpm
The standard deviation of the population ,
= 10
Sample size, n = 12
Sample mean, 
= 95
The reading rate of students follows the normal distribution.
Let z = 
= 
= 1.732
Probability that the mean reading exceeds 95 wpm = P( >95)
= P(z>1.732)
= 1- P(z<1.732)
= 0.4582
[The value 0.4582 found from the area under the normal curve using tables].
Learn more about Normal Distribution at brainly.com/question/27701525
#SPJ4
Answer:
<h2>19,600 J</h2>
Step-by-step explanation:
The potential energy of a body can be found by using the formula
PE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 9.8 m/s²
We have
PE = 500 × 9.8 × 4
We have the final answer as
<h3>19,600 J</h3>
Hope this helps you
Answer:
C
Step-by-step explanation:
Subtract column by column from the left, that is
6x² - 3x² = 3x²
- 5x - (+ 8x) = - 5x - 8x = - 13x
3 - (- 4) = 3 + 4 = 7
result of subtraction = 3x² - 13x + 7 → C
Answer:
h
Step-by-step explanation:
multiplication and inference
Answer: A
Step-by-step explanation: A is the correct answer because once you do the math (6*5/2+22) it gives you the correct amount. You also need to pay attention to the greater then and less than signs so that you don’t get confused.
If you found this answer helpful, give it a five star rating and a thanks!
(Even a brainliest if you want ;D)
