Mathematics for Elementary Educators II Questions and Answers Already Passed

Mathematics for Elementary Educators II Questions and Answers Already Passed There are approximately 2 lbs of muscle for every 3 lbs of body weight of a certain animal. For a 66-lb animal, how much of the weight is muscle? 66 Divided by 3 x 2 = 44 Robert weighs 160 lb on Earth and 352lbs on another planet. Find Jeremy's weight on that planet if he weights 180lbs on Earth. Times 180 x 352 = 63360 then divide by 160 the answer is 396 There are six adult divers to each teenage driver in a city. If there are 14,832 adult drivers how many teenage drivers are there? 14,832 divided by 6 = 2472 On a city map a rectangular park has a length of 2 in. If the actual length and width of the part are 400 ft and 100 ft, respectively how wide is the park on the map? 2 times 100 = 200 divide 200 by 400 = 1/2 On a map 1/2 in represents 4 miles if two cities are 18 inches apart on the map what is the actual distance between them? 8 miles = 1 inch 8 miles times 18 inches = 144 If a certain recipe takes 1 1/4 c sugar and 4 c milk how much milk should be added if the cook only has 1 cup sugar? 4 divided by 1 1/4 = 3 1/5 Vonna scored 48 goals in her soccer practice. If her success to failure rate was 3:2 how many times did she attempt a goal? Times the failure rate of 2 x 48 goals kicked = 96 then divide by the number of successes 96/3 = 32 then add total goals kicked 32 +48 = 80 Subtract when dividing Square roots top and bottom higher number on top, lower number on bottom 2 1/2 is to 6 as x is to 18 2 1/2 x 18 = 45 then divide by 6 = 7 1/2 6 over 7 = 3x over 42 7x3x = 21x then 6x42 = 252 then divide by 21 = 12 rational number any number that can be written as a fraction irrational numbers numbers that cannot be expressed in the form a/b, where a and b are integers and b =0. Intergers whole numbers and their opposites terminating decimal a decimal whose digits end and the prime factorization of the denominator contains no primes other then 2 or 5 Decimals from Greatest to Least write them all out in a row add 0's to make them all have the same decimal places, put them in order by decimal places. Negatives are backwards Fraction to a Decimal Use F-D key on the calculator 3.36 with line over the 36 convert to 336.36 then subtract 3.36 from that and place it over 99 so = 333 over 99, then reduce to lowest terms Order from greatest to least with line over the repeating numbers no line, one line over last number, line over 3 numbers, line over 2 numbers Order from greatest to least negative numbers with line over repeating numbers Same order as when they are positive numbers no line, one line over last number, line over 3 numbers, line over 2 numbers 522.16 Rounded to the nearest hundred 500 522.16 Rounded to the nearest tenth 522.2 522.16 rounded to the nearest unit 522 Rounding numbers left side is dreds, right side is dths A baseball player gets 14 hits in 40 at bats, what percent of the at bats are hits? Divide 14 by 40 = 35% 102 is 60% of what number? Change the 60% to 0.6 and divide 102 by 0.6 = 170 98.0 is what percent of 24.5? 98 divided by 24.5 = 4 then 4 times 100 = 400% 68 is 40% of what number? change 40% to a decimal .4 then divide 68 by 4 = 170 A person collected $2,800 on a loan of $2,400 they made 5 years ago, if the person charged simple interest what was the rate of interest? 400-2,400xrx5 400= 2400 x 5 = 12000 Divide both sides by 400 x 12,000 = 0.0333 Change to a percent 0.0333 x 100 = 3.33 What is the square root of 28? find common denominators then leave the 2 on the right to find the answer 2 to the square root of 7 is the answer. Square root power of 3 no number next to 54 answer is 3^3 = 27 with the number 2 inside the square root. because 2x27 = 54.