Amarathon is 26 miles 385 yards long . that is about what 1.4 x10 feet how many feet long is half a marathon

I believe that the correct measurement in feet is 1.4 x 10^5 feet. You forgot to include the ^5.

So since that is the measurement of 1 marathon, therefore half a marathon would simply be also half of that, that is:

0.7 x 10^5 feet

or

7 x 10^4 feet

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

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step-by-step explanation: