Rob runs a 100 meter race. after 5 seconds he has run 35 meters from the starting line and reaches his max speed and runs the remaining race at that speed. after 9 seconds he is 71 meters from the starting line. what is rob's distance 5+z seconds after the race started?

Mary used 1/7 of a spool of ribbon to complete 4 projects. she used the same amount of ribbon on each project. how much ribbon did she use on each project?

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n