Rebecca has 6 yards of ribbon It takes 3/8 yard to wrap one package How many packages can Rebecca wrap? Explain how to use the model to solve the problem

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.)

The trigonometric ratios sine and secant are reciprocals of each other

How is working backward similar to solving an equation?