How can I round decimals
2 answers:
Step-by-step explanation: To round a decimal, you first need to know the indicated place value position you want to round to. This means that you want to first find the digit in the rounding place which will usually be underlined.
Once you locate the digit in the rounding place, look to the left of that digit. Now, the rules of rounding tell us that if a number is less than 4, we round down but if a number is greater than or equal to 5, we round up.
I'll show an example.
<em>Round the following decimal to the indicated place value.</em>
<em>0.80</em><u><em>0</em></u><em>5</em>
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<em>To round 0.80</em><u><em>0</em></u><em>5 to the indicated place value position, first find the digit in the rounding place which in this case is the 0 in the thousandths place.</em>
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<em>Next, find the digit to the right of the rounding place which in this case is 5. Since 5 is greater than or equal to 5, we round up.</em>
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<em>This means we add 1 to the digit in the rounding place so 0 becomes 1. So we have 0.801. Now, we change all digits to the right of the rounding place to 0 so 5 changes to 0.</em>
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<em>Finally, we can drop of any zeroes to the right of our decimal as long as they're also to the right of the rounding position.</em>
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<em>So we can write 0.8010 as 0.801.</em>
Image provided.
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Option A: The vessel has sailed 34 miles South
Explanation:
Given that the vessel sails 41 miles S 35° E.
We need to determine the how far south the vessel has sailed.
Let us use the Pythagorean theorem to find the distance of the vessel has sailed.
Thus, we have,
Substituting ,
and
Hence, we get,
Simplifying, we have,
Multiplying both sides by 41, we have,
Rounding off to the nearest integer, we have,
Thus, the vessel has sailed 34 miles South.
Therefore, Option B is the correct answer.
Answer:
see attached image
Step-by-step explanation:
