MOST OF THESE PROBLEMS CAN BE SOLVED BY HAND USING PROPERTIES OF THE REAL NUMBERS. PROB- LEMS THAT REQUIRE TECHNOLOGY ARE INDICATED WITH A (*)
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1 STEP PROGRAM FUNDAMENTAL CONCEPTS BANK OF QUESTIONS MOST OF THESE PROBLEMS CAN BE SOLVED BY HAND USING PROPERTIES OF THE REAL NUMBERS. PROB- LEMS THAT REQUIRE TECHNOLOGY ARE INDICATED WITH A (*) SCIENTIFIC NOTATION. The expression 3 x x 3 equals to which of the following expressions (there may be more than one answer) a. 5 x 6 x b. 6 x 9 x c. 6 x 3 d. 5 x 3 e. None of them. The expression p 3 q r equals to which of the following expressions (there may be more than one answer correct) a. 6 p q p r b. p 3 q r c. 6 pqr d. 6 pq pr e. None of them 3. Write each of these numbers in scientific notation Write in scientific notation the result of each of the following operations The number 3 4 can be written as (more than one answer is possible) a. 4 8 b. 4 3 c. 3 4 d e. All of them 9. The speed of light is 3 x 0 8 meters/second. If the sun is.5x 0 meters from earth, how many seconds does it take light to reach the earth. Express your answer in scientific notation 0. What is the ratio of Milky Way radius to our solar system radius given that, the distance from pluto, the farthest planet from the sun in the solar system, to sun is meters and the Milky Way disk radius is.3.9 x 0 0 meters. Round the coefficient to the nearest tenth
2 FUNDAMENTAL KNOWLEDGE BANK.nb. Using the following data:the volume of a sphere with radius R is V 4 3 Π R3 Radius of the earth meters Mass of earth kilograms Find the density of the earth in kg m 3 (Note: this method will only yield an approximate value for the density of the earth).. Given that the average density of water is 000 kg/m 3, what would be the average density of the earth (closest tenth) in gm/cm3? DIMENSIONAL ANALYSIS These are some conversions you can use for these problems. Of course, there are many more. Make sure in each problem you indicate where you start and all the conversion factors used.54 cm ft m 6 oz 000 m 580 ft g in in 00 cm lb km mi lb 3600 s mg g L cm hr 000 µg 000 mg 000 ml 0 mm. An Olympic swimming pool is 5 meters long. How long is it in feet?. The density of white ash used in making wooden baseball bats is listed as 0.05 lb inch 3. The density of aluminium used in making aluminium baseball bats is.70 g cm 3. Which material has more density? 3. A can of certain soda contains 55 milligrams of sodium. If the can of soda contains 300 ml, how many pounds of sodium would there be in one liter of the same soda? 4. The speed of light is 3.00 x0 8 meters per second. a. What is the speed of light in feet per second? b. What is the speed of light in kilometers per day? c. One light-year is the distance the the light travels in a year. What is a light year in miles per second? 5. A car travles at 60 miles per hour. How fast does it travel per minute? Give your answer using different distance units as indicated below. a. Feet b. Meters c. Kilometers 6. You have a great job in which you earn $35 per hour. * How much do you earn per minute? * How much do you earn per week? ( week=40 hours) 7. You are in Paris and want to buy some peaches for lunch. The sign on the fruit indicates that peaches are.5 euros per kilogram. On that day the euro was.35 dollars. How much does a pound of peaches cost in dollars?
3 FUNDAMENTAL KNOWLEDGE BANK.nb PERCENTAGES, RATIO, PROPORTIONS. Calculate Calculate What is 3% of 7? What is 0.00% of 350? What percentage of 37 is 5? 3. Write as percent A population of animals increases at 3.5% every two years. If the initial population is 0, how many animals will there be after 6 years? 5. A river is treated due to contamination. The amount of contaminant X in the river is decreasing by 0.5% every 6 hours. If it is estimated that on average 70% of a cubic feet of water is not contaminated with contaminat X,, what percentage of a cubic foot is expected to be contaminated with contaminat X after day of treatment? 6. In a farm there are goats, cows, and horses. The horses represent 5% of the animals. The total number of goats and cows is 0, and the ratio of goats to cows is /3. * What is the ratio of horses with respect to the other animals in the farm? * How many horses are there? * How many animals of each type are there? 7. A population is bacteria is growing at 30% per hour. If we start with 800 bacterias, how many are there after 4 hours? 8. Find the slope of the line whose equation is x 3 y 6 3 x y x y 0 9. Find the equation (slope-intercept form) of the line through i) 3, and perpendicular to the line y 8 5 x ii), and perpendicular to y x 5 iii) 3, 0.5 and perpendicular to y 0. x Find k so that the line through i) (-3,) and (k,4) is parallel to 3y-x=7 ii) 3, and 4, k is parallel to x y iii) 4, 0 and k, is parallel to y x 0
4 4 FUNDAMENTAL KNOWLEDGE BANK.nb. Find an equation of the line with graph below (,5) 0, 5 EQUATIONS AND INEQUALITIES. x 3 x, solve for x. 5 d, solve for d 3. t t solve for t a a, solve for a m m, solve for m 6. 3 t, solve for t 7. A 3 5, solve for A 8. x 3, solve for x 9. x 3 x 5, solve for x 0. x 5, solve for x 3. 7 x 8.5 x 8, solve for x. 4.5 x, solve for x 3. 3 x , solve for x 4. Represent the interval, 8.5 using a. A double inequality b. An inequality with absolute value.
5 FUNDAMENTAL KNOWLEDGE BANK.nb 5. x x, solve for x 6. How many distinct solutions does x 4 x 4 have? 7. The solution to the inequality x 3 x is 8. z z 7 4 solve for z 9. 6 x 6 x 0 solve for x 0. r 3 r 5 solve for r Solve each of the equations below for the specified variable. P V K for V. i p r t for p 3. A B b for B 4. C 5 F 3 for F 9 This material is based upon work supported by the National Science Foundation under Grant # DUE Copyright 007
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