(ii) Round off the number of seconds in an hour to 1 significant figure. 4000 A plane travels at a speed of 212 mph. b) By rounding 212 to 1 significant figure and using your answer to part (ii), work out an estimate for the number of seconds the plane takes to travel 1 mile.

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