Asked by Holfbrincl
How do i calculate these and express the answers in significant digits?
2.865 x 10^4m x 1.47 x 10^3
8.071 cm^2/ 4.216
1.142 x 10^-8 mm^2 / 8.5 x 10^-4 mm
i tried the first one and got 4212. but i don't know if it's right
2.865 x 10^4m x 1.47 x 10^3
8.071 cm^2/ 4.216
1.142 x 10^-8 mm^2 / 8.5 x 10^-4 mm
i tried the first one and got 4212. but i don't know if it's right
Answers
Answered by
DrBob222
I don't understand the questions since some have units and others don't.
For first one, I have
2.865E4 x 1.47E3 = 4.21155E7. The first number has 4 s.f. and second has 3 s.f. The rule in multiplying is that the final answer may have no more s.f. than any of the numbers multiplied. Therefore, you are allowed 3 s.f. in the answer so you would round to 4.21E7. I don't know what unit that 1.47E3 has.If it isn't m that may complicate the problem a little.
For first one, I have
2.865E4 x 1.47E3 = 4.21155E7. The first number has 4 s.f. and second has 3 s.f. The rule in multiplying is that the final answer may have no more s.f. than any of the numbers multiplied. Therefore, you are allowed 3 s.f. in the answer so you would round to 4.21E7. I don't know what unit that 1.47E3 has.If it isn't m that may complicate the problem a little.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.