Risa is sewing a ribbon around the sides of a square blanket. each side of the blanket is 72 inches long. how many inches of ribbon will risa need

4a. is 3 miles every hour

4b. is 1/3 of an hour per mile

step-by-step explanation:

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

read more on -

step-by-step explanation: