The product of a number and 10 increased by 1

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

In a graph with several intervals o data how does a constant interval appear? what type of scenario produces a constant interval?

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.