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Math
1. Is it more appropriate to use scientific notation for approximates or exact numbers? why? 2. In one plantation, there are 2700 young trees correct to 2 significant figures. In the other there are 830 full grown trees, correct
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SCIENCE  PLEASE HELP PLESE
1) Round 578.683 m, 47.3333 kg, and 789.5 cm to four significant figures. 2) Find the weight of a 12.25 kg dog. Round your answer to the correct number of significant figures. Use weight=massxfreefall acceleration. 3) Round
asked by Andra on September 28, 2014 
Science (Chemistry!)
I just do not understand ANYTHING about multiplying/dividing/adding/subtracting significant figures! For example, the problem is: Solve the following to the correct number of significant figures: (5.039)(0.0074) What am I supposed
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answear in standard exponential form with correct number of significant figures 0.57 cm X 0.86 cm X 17.1 cm= what don't you understand? Please be specific. You may have two significant figures in the answer.
asked by Bryan on January 15, 2007 
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Hi guys! I just learned about significant figures today, and I have a question about them. My teacher gave us a problem where all values have what I think is four significant figures (like 44.56) except the value for temperature
asked by Allie on September 9, 2015 
Physics
6) A school bus moves at 2.2 m/s as it pulls away from the bus stop what is the speed of the bus 20 s later after its speed has increased by 5.225 m/s? 7) The height of a computer screen is 31.25 cm and its width is 47 cm. a) is
asked by anonymous on September 13, 2015 
Chemistry
I have a Chemistry question which should be very simple but I do not know what significant figures are. Assuming the following numbers are measurements and using the rules for significant figures, determine the answer for the
asked by Pablo on January 10, 2013 
stoichiometry
How many grams of Fe is needed to make 8 g of FeO3. I was given Fe + H2O > H2 + FeO3. I balanced it: 2Fe +3H2O > 3H2 +Fe2O3. divided 8 by 160 (sum of parts of Fe2O3 got .05 multiplied .05 times 2 because ratio was 2:1 and
asked by CJ on December 1, 2006 
Physics
i really dnt understand wen i revise it nw so cn u xplain the solutions 2 me. Thnks.[take g=10 ms^2] Two particles P & Q, of equal mass m, are attached to the ends of a light inextensible string. The string passes through a small
asked by LingWarm on September 29, 2008 
chemistry
Suppose you are asked to find the area of a rectangle that is 2.1cm \rm cm wide by 5.6cm \rm cm long. Your calculator answer would be 11.76 cm 2 \rm cm^2 . Now suppose you are asked to enter the answer to two significant
asked by Lindsey on August 29, 2013