Vince's 2011 act reading score was below 33% of all the scores. if the mean and standard deviation for all act reading scores in 2011 were 21.3 and 6.2 respectively, what was vince's score?

Shiny white dental insurance costs $258 per year. approximately one-third of insured people need a filling, which averages $110 each. 80% of insured people get a preventive check-up each year, and the average cost of this visit is $95. if you consider shiny white’s income and expenses, what is the expected value of each insured customer?

Given a: b and b: c, find a: b: c. write the ratio in simplest form. a: b=6: 10 and b: c=21: 33

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'