268 rounded up would be 270 and 354 rounded would be 350, 270+350=620
Whoa. Ok. I hope you don't need work ...
1) 3x
2) x
3) 6x
4) 3x
5) 6x
6) 4x
7) 2x
8) x
9) 2x
10) 3x^2
11) x^2
12) 5x^2
13) 3x^2+3x
14) 2x^2+3x
15) 2x^2+4x
16) 2x^2+5x
17) x^2+3x+3
18) 6x+9
19) 2x^2+3x+2
20) x^2+x+5
21) x+5y
22) 4x+y
23 on is cut off, sorry! :(
Hope this helps!
Using proportions, the approximate length of time, in years, for the watch to lose exactly 24 hours is:
(d) 240.
<h3>What is a proportion?</h3>
A proportion is a fraction of a total amount, and the measures are related using a rule of three. Due to this, relations between variables, either direct or inverse proportional, can be built to find the desired measures in the problem.
24 hours have 24 x 3600 = 86400 seconds, hence the <em>rule of three</em> is given by:
One second - 1/365 year
86400 seconds - x years
Applying cross multiplication:
x = 86400/365
x = 240.
Hence option D is correct.
More can be learned about proportions at brainly.com/question/24372153
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Answer:
you didnt attach anything
Step-by-step explanation:
4.31 to 1 significant figure is 4.3