If everything was marked down 30% and the original price of a hat is 18$ what is the clearance price

If i have 20$ and i gave 5$ away how much i got

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels. ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0