What is the percent decrease from 60 to 39?
2 answers:
Answer: 35%
Step-by-step explanation: To find the percent decrease, we use the following formula.
The amount of change is the difference between the two numbers which in this case is 60 - 39 and the first number is 60.
60 - 39 is 21 so we are left with 21/60.
60 divided into 21 .35 times. However, our problem is asking for the percent which means we can move the decimal point two places to the right to get 35.
Therefore, the percent decrease is 35%.
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Answer:
0.003
Step-by-step explanation:
By formula we know that:
z (x) = (x - m) / [sd / sqrt (n)]
where x is the value we want to know (60,000), m is the mean (63500), sd is the standard deviation (6100) and n is the sample size (35).
Replacing we have:
z (60000) = (60000 - 63500) / [6100 / sqrt (35)]
z = -3.39
If we look in the normal distribution table (attached), we have that the probability is 0.0003.
