SBI-Ratio-Proportion Concept Flashcards
If-Then Statement: The If statement describes a ratio between two quantities (i.e., 54 minutes to 6 miles) in one situation and the Then statement describes a multiplicative decrease or increase in the quantities (x minutes to 2 miles) in another situation so that the two ratios will be the same when we solve for x.
Proportion: An If-Then statement of equality between two ratios/rates that allows us to think about the ways that two situations are the same.
It is recommended that when cooking a turkey, you allow 40 minutes for every 2 pounds of turkey. Marjorie cooked her 8-pound turkey for 120 minutes. Is this the correct number of minutes based on the recommendation? Explain your reasoning.
Toshi used exactly 2 cans of icing to cover 24 cupcakes. How many cupcakes can she ice with 3 cans of icing?
Body builders say that while lifting weights they need to drink an amount of water proportionate to the amount of time they lift. The standard amount is 8 oz. of water for every 30 minutes of weightlifting. If you plan on lifting weights for 2.25 hours, how many ounces of water should you drink?
Rafael finished the Boston Marathon (26.2 miles) in 4.75 hours. At this pace, how long would it take him to run the 50-mile JFK Ultra marathon in Washington, D.C.?
Carlos is on the school’s track team. He takes 54 minutes to run 6 miles. Assuming that he runs at a constant pace for all 6 miles, how long did it take him to run 2 miles?
Ming watched TV for 8 hours on Saturday and saw 56 food commercials. How many food commercials did she watch each hour?
The Frank family from Arizona, USA, is going to England for their summer vacation. They exchanged $50 for ￡27 (British pounds). At that exchange rate, how many British pounds could they get for $75?
Alphonse and McKenna drove to Canada. The speed limit for a road they were on in Canada was posted as 90 kilometers per hour. Alphonse was driving 65 miles per hour. McKenna is a runner and told Alphonse that a 5 kilometer race is about 3.1 miles long. Were they driving under or over the speed limit?
A tourist from Germany came to America and exchanged €250 (euros) and received $354. Upon his return to Germany, he had $50 left over. Based on the same exchange rate, how many euros would the tourist receive for his remaining American dollars?
