SCIENCE  PLEASE HELP PLESE
posted by Andra .
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 3155.24m, 8.777 73 cm, and 93.775 57 kg to one less significant figure than they each have currrently.
4) Multiply 4.135 x 4.688 888 887 m x 8.7m round your answer to the correct number of significant figures.
PLEASE explain each of the answers to me in simple language. I need to submit these by tonight and I struggled and I know my answers are wrong. Thank you.

SCIENCE  PLEASE HELP PLESE 
Damon
1) Round 578.683 m, 47.3333 kg, and 789.5 cm to four significant figures.
0,1,2,3,4 round down
5,6,7,8,9 round up
578.6 83
8 is greater than 4
so this becomes
578.7 meters
47.33 33
3 is less than 4 so this becomes
47.33 kilograms
789.5 cm
This already has four significant figures 
SCIENCE  PLEASE HELP PLESE 
Damon
2) Find the weight of a 12.25 kg dog. Round your answer to the correct number of significant figures. Use weight=massxfreefall acceleration.
g is different in different places on earth. We need it to four significant figures because your mass is to four sig figs.
I will call 9.806 65 m/s^2 = 9.807 m/s^2
m g = weight = 12.25 * 9.807 = 120.1 Newtons 
SCIENCE  PLEASE HELP PLESE 
Damon
3) Round 3155.24m, 8.777 73 cm, and 93.775 57 kg to one less significant figure than they each have currently.
====================
3155.24
4 is less than 5 so
3155.3
3<5 so
8.7777
93.77557
7>5 so
93.7756 
SCIENCE  PLEASE HELP PLESE 
Damon
4) Multiply 4.135 x 4.688 888 887 m x 8.7m round your answer to the correct number of significant figures.
============================
You only have 2 sig figs because you said
8.7 not 8.70000000
so
19.388555555
is
19 <answer 
SCIENCE  PLEASE HELP PLESE 
Andra
Thank you Damon
Respond to this Question
Similar Questions

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 … 
Significant figures in chemistry
can someone please explain significant figures to me? 
physics
Suppose you are asked to find the area of a rectangle that is 2.1 wide by 5.6 long. Your calculator answer would be 11.76 . Now suppose you are asked to enter the answer to two significant figures. (Note that if you do not round … 
Chemistry
Suppose you are asked to find the area of a rectangle that is 2.1 wide by 5.6 long. Your calculator answer would be 11.76 . Now suppose you are asked to enter the answer to two significant figures. (Note that if you do not round … 
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 following … 
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 figures. … 
Science Significant Figures
Calculate the area, with the appropriate number of significant figures, of a rectangular room that is 14.10 m wide by 15.0 m long. If I multiply the two values and round to the nearest whole number, I get 212 m^2. Is this right? 
Chemistry
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 (which … 
physics
round of the following digits 3.65*105(upto are place of decimal) 0.882026(upto three significant figures) 311.299(upto four significant figures) 4.783(upto two significant figures) 
Math
Rounding to significant figures 99.98 to 3 significant figures Can it apply to this number as if I round to 100 this is one significant figure or we keep it as 99.9. Please clarify And same number to 2 sig figure Will it be 100?