Within a really large population items either have or do not have a particular characteristic. We take a sample of size 80 of that population. Within that sample we find that we have 27 Japanese cars. Calculate the 99% confidence interval for the true proportion of cars that are Japanese.

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

Simplify the expression. -2/5(10+15m-20n)

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?