What type of number can be written as a fraction p/q where p and q are integers and q is not equal to 0

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart