Math 20 Hybrid Exam 3 (Ch 5, 6.1, 6.2-partial)
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1 1. Use pencil. Math 20 Hybrid Exam 3 (Ch 5, 6.1, 6.2-partial) Read and sign the following before you begin: 2. Show clear and complete work on this exam in order to get credit. If I can t read what you ve written, you will not get any credit. 3. You may use only provided scratch paper but show all work on test. WORK ON SCRATCH WILL NOT BE GRADED. You must turn in all scratch paper. 4. Write answers in the space provided and SIMPLIFY/REDUCE ALL answers. 5. Leave all personal items under your chair in a closed bag. When you take a test, you must clear ALL items off of your work surface. Your cell phone must be OFF and put away in your backpack or purse. Turn off and put away ALL electronics. 6. Keep your eyes on your own paper! You are not allowed to talk to anyone during the exam except to ask the instructor a question. If you speak to anyone other than the instructor, the integrity of your exam has been compromised and it will be taken away and you will receive a zero. 7. No calculators or notes are allowed when taking an exam. 8. You may not leave the room for any reason. If you have to use the restroom, you must turn in your exam. You may use the restroom ONCE during the exam. Use of a calculator, notes, cell phone, or scratch paper other than what is provided will be considered cheating. Cheating of any kind will result in a zero on the exam and loss of makeup privileges. Failure to follow ANY of these directions will result in ten points being deducted from your test score. I have read the testing policies and will abide by them. (signature) Print Your Name: Instructor s name: L. Trieu Today s date: July 17, 2014 Points / % Good luck!
2 1) Divide. If the answer is undefined, abbreviate as UND. a) b) c) d) e) ) Identify the value of points and on the number line. You fractions (no decimals). A= B= 3) Write the decimal number in expanded form as a sum of fractions. 4) Name the digit that has the given place value. hundredths ten-thousandths Write the decimal in words. Spelling counts! Write the decimal in numbers. 5) 6) one hundred six hundred-thousandths 7) Write each decimal as a fraction or mixed number in lowest terms. 8) Round each decimal to the place indicated. to the nearest thousandth to the nearest tenth to the nearest cent Page 2 of 9
3 Perform the indicated operation to find the exact answer. (Do NOT round.) Be sure to check whether or not your answer is reasonable. Use the repeating bar if necessary. 9) 10) 11) 12) 13) ( )( ) 14) Molly earned for hours of work. Find her earnings per hour. Include units. Set Up Page 3 of 9
4 Divide. Do NOT round. 15) 16) 17) 15) 16) 17) 18) A circle has diameter 20 inches. Find the exact area of the circle. Next, use this answer and to estimate the area. Exact Area: (Include Units) Estimated Area: (Include Units) 19) If and, evaluate. Show all steps for credit. 20) Write or in each box to make a true statement. Page 4 of 9
5 Use the order of operations to simplify each expression. 21) 22) 23) ( ) ( ) ( ) 24) Write each fraction or mixed number as a decimal. Do NOT round. Use the repeat bar if necessary. a) b) c) d) e) Page 5 of 9
6 25) Simplify. a) b) Hint: Convert the decimal to a fraction. ( ) 26) Evaluate/simplify each expression. a) b) c) d) 27) Complete each definition. A ratio is a that compares two quantities with the. A rate is a that compares two quantities with. 28) The price of Kate s favorite brand of lipstick increased from $5.50 to $7.00. Find the ratio of the increase in price from the original price. 29) Write the rate as a fraction in lowest terms: 90 miles per 2.5 gallons Page 6 of 9
7 English Measurement Relationships Length Weight 1 foot (ft) = 12 inches (in) 1 pound (lb) = 16 ounces (oz) 1 yard (yd) = 3 feet (ft) 1 ton (T) = 2000 pounds (lb) 1 mile (mi) = 5280 feet (ft) Volume/Capacity Time 1 cup (c) = 8 fluid ounces (fl oz) 1 minute (min) = 60 seconds (s) 1 pint (pt) = 2 cups (c) 1 hour (hr) = 60 minutes (min) 1 quart (qt) = 2 pints (pt) 1 day = 24 hours (hr) 1 gallon (gal) = 4 quarts (qt) 1 week (wk) = 7 days (day) 1 year (yr) = 365 days (day) Write each ratio as a fraction in lowest terms. Change to the same units when necessary. You may use the provided table. 30) 31) 32) 33) Below is a problem with an incorrect solution. Identify all errors committed in the solution and explain what the student did wrong. Problem: Add. Solution: Page 7 of 9
8 34) Find the best buy for dog food. You have a coupon for $1 off on 25 pounds or more. Brand A: 50 pounds for $22.95 Brand B: 25 pounds for $11.95 Brand C: 8 pounds for $3.60 Provide the exact cost (unit rate) for each brand. Do NOT round! Unit Rate for Brand A Unit Rate for Brand B Unit Rate for Brand C Best Buy is Brand Decide whether each proportion is true or false writing both ratios in lowest terms. SHOW YOUR WORK for credit. 35) 36) 37) 38) TRUE FALSE TRUE FALSE TRUE FALSE TRUE FALSE Page 8 of 9
9 *Extra Credit* I. Evaluate. You may earn credit AT MOST 4 points. Circle all answers. ( ) II. What is the highest level math class you plan on taking? Any reasonable answer is acceptable. III. Adrienne worked 46.5 hours this week. Her hourly wage is $14.24 for the first 40 hours and 1.5 times that rate over 40 hours. Find her total earnings. IV. A number is rounded to What is the smallest the number could ve been before rounding? VII. Find the best buy by calculating the cost for each. You have a 35 cents coupon for Brand A, Brand B is on sale for 15% off, and Brand C is on sale for 10% off. Show ALL work for credit. Brand A: 25 ounces for $13.49 Cost for each Brand: Brand B: 35 ounces for $21.18 Brand C: 45 ounces for $26.02 A: $ B: $ C: $ Page 9 of 9
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