Which deposit earns more interest, $250 at 6% per year, or $400 at 4% per year? show how you know.
2 answers:
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56 %
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Answer:
81.86%
Step-by-step explanation:
We have been given that final exam scores are normally distributed with a mean of 74 and a standard deviation of 6.
First of all we will find z-score using z-score formula.
Now let us find z-score for 86.
Now we will find P(-1<Z) which is probability that a random score would be greater than 68. We will find P(2>Z) which is probability that a random score would be less than 86.
Using normal distribution table we will get,
We will use formula to find the probability to find that a normal variable lies between two values.
Upon substituting our given values in above formula we will get,
Upon converting 0.81859 to percentage we will get
Therefore, 81.86% of final exam score will be between 68 and 86.
For this case we must find the greatest common factor of both expressions, the GFC will be the greatest number that is a factor of both numbers, that is:
The number 4 is the greatest number that divides 32 and 12 resulting in a whole number.
In addition, both expressions have as a common factor,:
Thus,
Answer:
Option A