You are making cement planters in the shape of a rectangular prism 5 inches tall, with a base that has 10.5 inch long sides. There are openings for 4 plants. Each opening is a cubic space 3 inches on each side. Each bag of cement mix makes about 2,500 cubic inches of cement. How many planters can you make from one bag of cement mix?

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What is the missing step in this proof ?

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?