A man gets a job with a salary of $40,000 a year. He is promised a $2,670 raise each subsequent year.
During a 7-year period his total earnings are $

Fredrick designed an experiment in which he spun a spinner 20 times and recorded the results of each spin

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?

Margie is practicing for an upcoming tennis tournament. her first serve is good 20 out of 30 times on average. margie wants to know the estimated probability that her first serve will be good at least four of the next six times she serves. how could she design a simulation for this scenario?