The equation r= -0.028(t) + 20.8 can be used to predict the world record in the 200-m dash, where r is the record in seconds and t is the number of years since 1920. in what year will the record be 18.0 second?

Find the balance at the end of 4 years if 1000 is deposited at the rate of

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?

Eliza wants to make $10,000 from her investments. she finds an investment account that earns 4.5% interest. she decides to deposit $2,500 into an account. how much money will be in her account after 14 years?