A random sample of 80 observation produce a mean of x =25.8 from a population with a normar distribution and a standard deviation =3.35

50-60=10

step-by-step explanation:

answer:   expression= p+p*d%

price reduction + sale price = $625

sale price: $p+$p*d%

where d% is the percentage of discount

step-by-step explanation:

original price = p

price went down by $150 price reduction $p*d%

sale price= $ 475

therefore the price before sale is: $625

and the expression that shows the price before sale is: p+p*d%

3.07*10^-4

move the decimal 4 places to the left

.000307