Dr. Gundal's Math Class
2nd 9-weeks Exam ReviewFind each unit rate. Round to the nearest tenth if necessary.1.$207.75 for 15 hours2.Darron uses a family recipe to make meatballs. If he plans on using 2 cups of bread crumbs, about how many pounds of hamburger does Darron need to use to keep the relationship between bread crumbs and hamburger proportional?Bread Crumbs (c)Hamburger (lb)1233.The following table shows the relationship between the time taken to perform the jumps by Maria. Express the relationship in the form of ratio and determine whether it is proportional or nonproportional?Jumps completed by Maria1216314958Time (seconds)364893147174Solve each proportion.4.5.Five out of every seven households have cable TV.? If 43,400 households in a certain city have a TV, how many do not have cable TV?Complete.6. (1 mile = 5,280 feet)7.1,874 L = ____ kL (1 kL = 1000 L)8.The ballpark near Adam’s house in the Orange County is 42 meters long. What is its length in yards? Round to the nearest hundredth.(1 meter = 3.28 feet and 3 feet = 1 yard) 9.Kent pedaled his new bicycle at 12 miles per hour. How many kilometers per hour is this?(1 mile = 1.61 kilometers) Find each number. Round to the nearest tenth if necessary.10.What number is 175% of 85?Find each number. Round to the nearest tenth if necessary.11.31.5 is 105% of what number?12.Last weekend, 5% of the tickets sold at Seaworld were discount tickets. If Seaworld sold 200 tickets in all, how many discount tickets did it sell? Use the percent proportion.Write an equation for each problem. Then solve. Round to the nearest tenth if necessary.13.64.96 is 11.2% of what number?Find the total cost to the nearest cent.14.$134 bicycle; 6.5% tax15.Patricia gave 13% of the cost as a tip to the delivery person who delivered her car after service at a cost of $254. What will be the total cost with tip to the nearest cent?16.The marked price of a used car is $2,000. A discount of 14% is allowed with a cash payment. If John buys the used car with cash , find the selling price of the used car.17.Juanita has $1600. If she invests her money at 3% interest, in how many years will she have $2,080?18.Susan deposits $2,200 into her account. How much will Susan have if she invests her money for years at a simple interest rate of 5.2%?Copy and complete the function table. Identify the domain and range.19.y = x – 6xx – 6y123420.Piano lessons average for an hour. The function represents the total cost t of piano lessons p for an hour. Draw the graph of the given function.21.The table shows the time taken for knitting dresses. Use the information to find the constant rate of change in number of dresses per day.Time taken (days)6172839Number of dresses3610216823422. Use the graph to find the constant rate of change of number of cars produced per hour in a car company.23.The table below gives the number of beads needed to make bracelets of lengths 9, 18, 27, and 36 inches.Number of Beads81162243324Bracelet Length (in.)9182736Find the value of the slope. 24.The graph below shows how much Labella got paid based on the number of hours she babysat.Find the slope of the line.The graph shows the cost of pizzas, including delivery, at a local pizza restaurant. 25.About how much would it cost for 15 pizzas, including delivery? 26.Twenty seconds after a plane in an air-show dives, it is 600 feet from where it began. After 60 seconds, it is 1800 feet from where it began. At what rate is the plane diving? 27.Solve the equation. 28. Two months ago a bicycle shop sold 80 bicycles. Last month, 118 bicycles were sold. Find the percent of increase in sales. 29. A $225 suit is marked down to $155. Find the percent of change. 30. A cheetah can run at a speed of 74.6 miles per hour. If a cheetah runs a distance of .8 mile, how many hours did it take? Write and solve an equation to answer the question.Answer Section1.$13.852.3.or ; proportional4.17.35.12,4006.7.1.8748.45.92 yd9.19.32 km per hr10.148.7511.3012.1013.58014.$142.7115.$287.0216.$1,72017.10 years18.$3401.2019.The domain is {1, 2, 3, 4}.The range is {–5, –4, –3, –2}.The domain is the input values or the x-values. The range is the set of output values or y-values.20.21. So, the number of dresses knitted increases by 6 for every one day.22. So, the number of cars produced increases by 5 cars for every one hour.23.24.425.10826.30 feet per second27.28.47.5% 29. -31% 30. 0.01 hrs ................
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