Round 15 to the nearest 10 would be 20, as it is closer to 20 than 10.
The nearest gram is in the ones column, so we must look at the tenths column (the first number on the right of the decimal). If this number if 5 or higher then we must round up and report the value as 1.0 g or if it is lower than 5 then we report the answer as 0.0. All other numbers are irrelevant. In this case (0.[5]3525) the number we are concerned about (in the square brackets) is 5, therefore we round up and the answer is 1.0 g.
No, it is not okay to round atomic masses to the nearest whole number because atomic masses are typically reported to several decimal places to account for the average mass of isotopes present in nature. Rounding to the nearest whole number would lead to inaccurate calculations and results.
After 5 half-lives, 3.125% (or 1/2^5) of a radioactive sample remains. Each half-life reduces the sample by half, so after 5 half-lives, there is only a small fraction of the original sample remaining.
There are approximately 14.17 grams in half an ounce.
If the fraction is less than half, round down. If the fraction is half or greater, round up.
You look at the fraction part (0.302) and see that it is less than one half, so you round it down to 2.
if the number after the first number after the decimal is 1-4, round it to 0. If it is 5-9, round it one higher number. EX: 4.56 rounds to 5.00, and 4.54 rounds to 4.50. They mostly round up to the nearest half number (like you said). It's not that hard to round numbers.
4.5 already is rounded to the nearest half.
To the nearest half, one half
1,500,000 is already rounded to the nearest half-million.
4/5 to the nearest half is 1.
53
6.5
It is 2.5
5.5
To the nearest whole number, 3