Answer:
7.50 stuped
Step-by-step explanation:
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126/7 = 18 so the quotient is 18. There is no need to use distributive property.
Answer:
2.5% of IQ scores are no more than 65
Step-by-step explanation:
The Empirical Rule states that, for a normally distributed random variable:
68% of the measures are within 1 standard deviation of the mean.
95% of the measures are within 2 standard deviation of the mean.
99.7% of the measures are within 3 standard deviations of the mean.
In this problem, we have that:
Mean = 95
Standard deviation = 15
Using the empirical rule, what percentage of IQ scores are no more than 65?
65 = 95 - 2*15
So 65 is two standard deviations below the mean.
By the Empirical Rule, 95% of the measures are within 2 standard deviation of the mean. Of those 5% which are not, 2.5% are more than 2 standard deviations above the mean and 2.5% are more than 2 standard deviations below the mean.
So 2.5% of IQ scores are no more than 65
Answer: Real number, Rational number.
Step-by-step explanation:
To solve this exercise you must know the following definitions:
1. A Rational number is a number that you can write as a fraction, whose numerator and denominator are integers.
2. By definition, the Real numbers contain Natural numbers, Whole numbers, Integers, Rational numbers and Irrational numbers.
3. Then, the number 2.55 can be written as a fraction: 
, therefore, it is a Real number and a Rational Number.
