Idon't know how to find the missing number can someone

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.)

Which of the following is an example of a rational number? a. π b. √ 9 c. √ 8 d. 3.8362319

3c2 + 2d)(–5c2 + d) select all of the partial products for the multiplication problem above.