4. A rectangular field measures, 616m by 456m. Fencing placed along its sides at equal distances. What
will be the distance between the posts if they are placedos
for apart as possible? How many posts are required?
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Answer is in the photo. I can only upload it to a file hosting service. link below!

https://cutt.ly/Kzv78uJ

1 number

if we use a graphing calculator, there is only one such number that satisfies the conclusion of the mean value theorem, that is, a number such that

where the right-hand side is the average rate of change of f on the interval [0.5,0.75], which is the slope of the secant line.

in the attached graph, the black line is the secant line which has its slope as the average rate of change of f on [0.5,0.75], while the orange line is the only tangent line to the graph of f in the interval that satisfies the mvt conclusion.