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Mathematics
OpenStudy (anonymous):

Attached question.

OpenStudy (anonymous):

OpenStudy (anonymous):

The distance an object travels is given by multiplying it's velocity with the time travelled at that speed. This, however, assumes a constant speed and direction; For the plot given of velocity against time, you can estimate the distance travelled by multiplying the velocity with the time, i.e. finding the area under the graph. Hence to estimate the distance travelled with the given graph, count the number of full squares (note that two halves equate to a whole square, too) under the line.

OpenStudy (anonymous):

Note also that 30mph is approximately 0.008 miles per second, and you should be able to find the answer.

OpenStudy (anonymous):

how owuld i do it

OpenStudy (anonymous):

If you consider the axes of the graph, each square under the line is worth 0.0014 miles. To find the answer, count how many full squares you have under the graph, then multiply this number with 0.0014 miles.

OpenStudy (anonymous):

are there 24? some are almost full but not quite

OpenStudy (anonymous):

For an estimate, you can count ones that are almost full too. Remember also that if you have two halves; together, they count as one whole square.

OpenStudy (anonymous):

well my thing needs a definite answer otherwise ill get it wrong

OpenStudy (anonymous):

What do you mean as a definite answer? Is it a multiple choice?

OpenStudy (anonymous):

no it's like short answer online.

OpenStudy (anonymous):

like there is one asnwer u have to type in

OpenStudy (anonymous):

Well, I count approximately 30 full squares (including halves). So my answer would be 30x0.0014 Which gives me 0.042 miles or 0.04 miles, depending on how many decimal places are required.

OpenStudy (anonymous):

ok thanks

OpenStudy (anonymous):

wait the units for the answer are feet not miles

OpenStudy (anonymous):

! Well, one mile is equal to 5280 feet. So (if my previous answer is correct), the answer is 5280*0.042=221.76 which is approximately 220 feet.

OpenStudy (anonymous):

wouldnt it be 222

OpenStudy (anonymous):

True, if you were rounding it to the nearest foot. I rounded to the nearest 10 feet.

OpenStudy (anonymous):

so which one is correct

OpenStudy (anonymous):

Generally with estimations you round to larger numbers.

OpenStudy (anonymous):

wow thank you! 222 was correct.

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