A scale of a model of a new building was created for approval by the city. The scale of the model is 3 inches=20 feet. If the mo
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Answer:
Probability = 0.1587
Step-by-step explanation:
The provided information is:
Let X be the scores of the IQ test for adults that is normally distributed with mean = 100 and standard deviation
= 15.
Also, US military has minimum IQ score of 85.
Thus, the probability that randomly selected adult does not meet US military enlistment standards is:
The probability can also be written as:
Thus,
Using the Normal probability table probability of Z = -1 is 0.1587
Thus, the required probability is 0.1587
Given:
Principal = $3000
Rate of interest = 4.7% = 0.047 compounded quarterly.
Time = 12 yeas
To find:
The value of John’s investment after 12 years.
Solution:
The formula for amount is
where, P is principal, r is rate of interest, n is number of times interest compounded in an year, t is number of years.
Substitute P=3000, r=0.047, n=4 and t=12 in the above formula.
Therefore, the required equation is .
We can further solve this.
Therefore, the value of John’s investment after 12 years is $5255.76.