Answer:
4.4% of the population with IQ between 120 and 125.
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 100
Standard Deviation, σ = 15
We are given that the distribution of IQ scores is a bell shaped distribution that is a normal distribution.
a) Let X be a person's IQ score.
Then, density functions for IQ scores is given by:

b) P(population with IQ between 120 and 125.)
Formula:



Answer:
15 units
Step-by-step explanation:
I just took this geometry test with the same question. Its 15
Answer:
C
Step-by-step explanation:
Proof by some contradictions:
D is not a good example because she does not pay anything upfront
B is not a good example because he pays <u>everything </u>upfront with some of the money from a third party
A is not right because the 500 is a security deposit, which is a different concept from a down payment
Therefore the answer should be C, where money is payed upfront and payed after he receives the product.