Keisha collects vintage glass marbles. Her favorite marbles have a diameter of 2.5 centimeters each. She keeps 6 of her favorite marbles in a pouch. One cubic
centimeter of glass has a mass of 2.6 grams. What is the mass to the nearest gram of the marbles in Keisha's pouch? Use 3.14 for pie

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?