What value of z is used in the 90% confidence interval of a
a/2 normal distribution?

Answer this question only if you know the answer! 30 points and

Write an inequality for this sentence the quotient of a number and -5 increased by 4 is at most 8

As a salesperson you get $50/day and $3.60/each sales you make.if you want to make $60 in one day, how many sales would you need need to make ? a 3b 4c 5d 6 show work.