For a 4-units class like Statistics, students should spend average of 12 hours per week studying for the class. A survey was done on students, and the distribution of total study hours per week is bell-shaped with
a mean of 15 hours and a standard deviation of 3 hours.
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Use the Empirical Rule to answer the following questions.
and
hours on this
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a) 68% of the students spend between
class.
b) What percentage of the students between 6 and 18 hours on this class?
c) What percentage of the students above 9 hours?

your answer would be 10x - 1

there are 25 people coming to the party

step-by-step explanation:

the text says that there will be 22 children at this party, 1 teacher, and 2 parents. so if you add them all together (22+1+2) it will equal 25. (=25)

step-by-step explanation:

a child is 12 years old, and his father is 32 years older. in how many years will the age of the father be 2 times the age of the child?

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this needs to be the answer format, or else your answer is incomplete.

if the number of years is x, then the equation is

in __ years