A cable that weighs 4(lb/ft)used to lift 700lb of coal up a mine shaft 350ft deep. Find the work done. Show how to approximate the required work by a Riemann sum. (Let x be the distance in feet below the top of the shaft. Enter xᵢ* as xᵢ.)
lim n → [infinity] Σ n i = 1 (______________)
Express the work as an integral.
₀∫____(____)dx
Evaluate the integral.
____ ft-lb