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I know is not 5 even though the 2 is one digit

also know is not zero because there are numbers with higher digits than 0

and finally I know is not five just because

so my only possible answers are: number 1, or number 2

http://www.usca.edu/chemistry/genchem/sigfig2.htm

that doesn't really help

i was there already

this means the equation would equal to 200

What equation? Equations have equal signs.

However the answer is not 1(or number 5)

I meant problem, I'm sorry

Maybe i read the question wrong, but thats what I need a guide

Explain how you went about eliminating options.

and I'm not sure why it can't be three, two, or four digits

What was the result you got before rounding up to 200 (which you should not have done).

163.2880239

Mind showing how you got that step by step?

I plot the whole problem in the calculator

No, you shouldn't have.

but I know I first would have to solve whats inside the keys

or i don't know what they are called in english

alright so: ((2+0.0031)+(41/12)=40

because i had to round up

to one digit right?

now I solve the whole thing 40×(2.45×1.83)=179.34

this means 179.34 rounds up to 200

right?

You should follow ORDER of OPERATIONS. Multiply BEFORE adding from left to right.

(2 + 0.0031) + (413 / 12)]×(2.45×1.83) =[(2+0.0031)+(413/12)]x(4.4835)

is that what you meant?

Okay, yes, we should keep track of parentheses as well. You should have gotten 4.48 for (2.45×1.83)

oh right because there is 3 digits in there

make sense

The result can only be accurate to two decimal places.

For that operation

[(2.0031)+(34.42)]x(4.4835)

[(2+0.0031)+(34)]x(4.4835)

now I add the ones inside, right?

Yep, but add according to the rules.

it would be 2.0

i mean 2

the lowest is 2 thats why, so 2+34=36=40

[40]x(4.48)=179.2

What rule says to round 36 to 40?

40 has only 1 digit. I rounded to one digit because of the two

How many significant figures does 4.48 have?

3

By the way, you shouldn't round 36 to 40.

alright

so 36(4.48)=180

36 has two significant digits which means our result should have only two significant digtts.

let me try, I'm gonna submit

Yes! it was 2 thank you so much

you helped me understanding it. The calculator is worthless!

The calculator does not know how to deal with significant digits unless you program it to do so.

but i guess there is some calculators that do, right?

The calculator doesn't know you want to round to significant digits.

yeah of course

Good luck with the rest of your homework. Have a good one.

Thank you! you too