What is the defination of focus of a parabola on a coordinate grid

Toyland is having a sale. all items are 20% off. how much will you save on an item that usually sells for 95$ explain your

What’s the domain of this function? fastttt

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.)