The answer is 1.25 hours.
STEP 1.
Each page has about 350 words: 1 page - 350 words
15 pages is x words: 15 pages - x words
1 : 350 = 15 : x
x = 15 * 350 : 1 = 5250
So, she has to type at least 5250 words.
STEP 2:
<span>Stephanie can type around 70 words per minute: 70 words - 1 minute
x words in 1 hour = 60 minute: x words - 60 minute
70 : 1 = x : 60
x = 70 * 60 : 1 = 4200
So, she types around 4200 words per hour.
STEP 3:
Now we have:
</span>- she has to type at least 5250 words
- she types around 4200 words per hour
5250 : x = 4200 : 1
x = 5250 * 1 : 4200 = 1.25 hours
Answer:
6/25
Step-by-step explanation:
6/25
The mean ( average ) is given as 1200 hours.
The standard deviation is 200, sample size is 100.
Find the standard error:
√(200^2 / 100) = 20
Now calculate the confidence interval. For 95% the Z number is 1.96
Multiply Z by the standard error:
1.96 x 20 =39.2
Now find the range that the mean should be within:
1200 - 39.2 = 1160.8
1200 + 39.2 = 1239.2
The samples should be between 1160.8 and 1239.2 for a 95% confidence interval.
Since the average was 1050, which is below 1160.8 the bulbs are not in compliance.
Answer:
??yes??
Step-by-step explanation:
