(42.70 + 0.259) / 28.4

I wanted to know, if it 1.510 or 1.51? because it has to be correct sig figs.

Your answer will be 1.51 because my teacher said you always solve for the lowest original number of sig figs in your problem, which in this case would be 3

wait oops xd i forgot rest of problem

it was

(42.70 + 0.259) / 28.4445 >_< sorry about that

I don't understand the <_>.

When you multiply or divide, Lisa is correct; i.e., the answer contains no more significant figures than the least accurate of the values used in the multiplication or division. For example, 24.3 x 0.98774 = 24.0082. Since the 24.3 has the smaller number of s.f., the answer should be rounded to 3 places which would make it 24.0
When the numbers are added or subtracted, the rule is a little different. For example,
24.1 + 0.113 + 0.5 = 24.71300 which will be rounded to the "NEAREST 0.1 SINCE that is the least accurate of the numbers. The answer will be 24.7. Here is a site that may help you.
http://members.aol.com/profchm/sig_fig.html

To determine the correct number of significant figures in a calculation, you need to consider the number of significant figures in each individual number being used.

In the expression (42.70 + 0.259) / 28.4, we have three numbers: 42.70, 0.259, and 28.4.

Let's analyze the significant figures in each number:

- 42.70 has four significant figures because all the digits (4, 2, 7, 0) are non-zero.
- 0.259 has three significant figures because all the digits (2, 5, and 9) are non-zero.
- 28.4 has three significant figures because all the digits (2, 8, and 4) are non-zero.

Now, perform the calculation (42.70 + 0.259) / 28.4:

42.70 + 0.259 equals 43.959 (rounded to the thousandth place due to the decimal point in 0.259).

Dividing 43.959 by 28.4 gives us 1.548408 (rounded to the millionth place due to the decimal point in 28.4).

When we consider significant figures, we need to round the final result to match the number with the least significant figures involved in the calculation, which is three (from 28.4).

Therefore, the final answer, rounded correctly to three significant figures, is 1.55.