During an experiment IKEA measured the time is it for a ball to roll down a ramp she set an angle she measured it took 1.010 seconds the exact time should take based on calculated 0.904 what was the experimental error 

Kelly is a salesperson at a shoe store, where she must sell a pre-set number of pairs of shoes each month. at the end of each work day the number of pairs of shoes that she has left to sell that month is given by the equation s=300-15x , where s is the number of pair of shoes kelly still needs to sell and x is the number of days she has worked that month. what is the meaning of the number 300 in this equation

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?

What is the distance between the points (2, 5) and (5,9)?