To round a decimal first you need to find what you need to round it by. Tenths place, hundredths place, thousandths place, and then you need to find the number to the right of it. If you are rounding to the hundredths place in 0.687, than you would look at 8 and see if it is above or below 5. If above, 0.687 turns into 0.7. If below it turns into 0.6. In this case it is higher so 0.7.

not trynna steal points ima help explain easier like

5 and above round up, 4 and below round down. No clue what this question is for

m∠a is 90°

m∠b is 40°

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.