Professor said: #3 you have $ x $/ringgit units don't cancel out also 1 liter/.26 gllns x 4 quarts/glln units don't cancel out always look that your units are diagonal to each other 5 did not convert grams of ocean water to kg of ocean water 7 you have $350 x $35/mile units are not going to cancel out

1. Convert 6.5 pounds into cups. The density of the liquid is 2.03kg/L. 6.5 pounds * 1kg/2.20 pounds * 1L/2.03kg1cup/0.24L=12.5 cups 2. Convert 3.409 miles per hour to meters per second. 1 miles / 1609.34 meters 60min/1 hour 60 seconds /1min=3600 seconds per 1 hour (3.409 miles / 1 hour * 1609.34 / 1 mile ) / 3600 seconds =1.524 meters per second 3. Which is a better deal, one gallon of gasoline for $3.79 or one liter for 3.25 ringgit (3.75 ringgits =$1 ). 1 gallon =3.79 liters 3.25/3.75=0.87 3.25 ringgits / 1 dollar 3.79 dollars / 4 liters * 1 liter / 0.95 dollars 3.79 dollars * 3.75 dollars /1 ringgit * 1 liter /0.26 gallons 1 gallon/ 4 quarts =13.66 3.25 ringgits * 1 dollar /3.75 ringgits * 1 liter /0.26 gallons * 4 quarts /1 gallon =13.33 The first option is the better deal 4. The recommended dose of medication is 5mg/kg of body weight. Your patient weighs 125 pounds. You have available three different pills containing 500mg,250mg, and 100mg of medication. Which pill should you give to your patient? 1kg=2.20pounds1kg=1000g1lb=454g125lbs454g/1lbs1kg/1000g5mgmedicine/1kg=284mg 250mg pill 5. The bromine content of the ocean is about 65 grams per million grams of ocean water. How many cubic meters of ocean water must be processed to recover 2.0 pounds of bromine if the density of ocean water is 1.08103kg/m3 ? 2.0 pounds of bromine * 453.592 grams / 1 pound * 1 million grams of ocean water / 65 grams of bromine * 1 cubic meter /1000kg1.08103kg/1m3 6. Cheryl is going to the Girl Scouts National Jamboree and has been asked to bring the smores supply for all the girls going from her district. Each giant chocolate bar makes 16 smores. Each girl will be limited to 5 smores during the Jamboree. She needs to buy them locally (nearby the Jamboree site) as they would all melt if she purchased them in advance. On average, the stores nearby the Jamboree site only carry 25 of these giant chocolate bars in stock. Cheryl is buying chocolate for 2525 girls. How many stores will she need to go to in order to purchase enough of the giant chocolate bars? 2525 girls * 5 smores / girl * 1 giant chocolate bar / 16 smores * 1 store / 25 giant chocolate bars 7. In the yearly fundraiser at school, kids can earn a phone if they raise $350 in donations. Aaron was able to get enough support from family and friends to earn $35 for each mile he runs. Aaron's problem is that he runs very, very slow, only 105 centimeters per second. How many hours will it take Aaron to run just long enough to raise the $350 and get himself a phone? 350 dollars * 35 dollars / 1 mile * 1 mile / 160934.4 centimeters * 1 second / 105 centimeters * 3600 seconds / 1 hour My dimensional analysis says 2.6 hours to run 10 miles but I do not agree. I believe it would take 4.33 miles per hour to run a total of 10 miles