charlee wants to send postcards to all of her family and friends but she does not have any postcards she does have 3 large sheet
1 answer:
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In 20 minutes, John can wrap 10 small boxes and Hank can wrap 12 small boxes. So, Hank can wrap more small boxes in 20 minutes than John can.
Step-by-step explanation:
Given,
John wraps;
2 small boxes = 4 minutes
1 small box =
In 20 minutes,
20 minutes =
20 minutes = 10 small boxes
Hank wraps;
3 small boxes = 5 minutes
1 small box =
In 20 minutes =
In 20 minutes, John can wrap 10 small boxes and Hank can wrap 12 small boxes. So, Hank can wrap more small boxes in 20 minutes than John can.
Keywords: division, multiplication
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Answer:
The probability that their mean life will be longer than 13 years = .9943 or 99.43%
Step-by-step explanation:
Given -
Mean = 15 years
Standard deviation = 3.7 years
Sample size ( n ) =22
Let be the mean life of manufacturing items
the probability that their mean life will be longer than 13 years =
=
=
= Using Z table
= 1 - .0057
= .9943