Starting at sea level, a submarine descended at a constant rate to a depth of -5/8 mile relative to sea level in 3/16 minutes. The submarine continues to descend at the same rate. What is the submarines depth relative to sea level after the first minute​

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

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