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Yesterday, #7/8# of the 64 students in a contest gave their speeches. How many students gave their speeches?

Answer 1

Julia Adams

Although not normally done it is correct to write #64# as #64/1# It is very rare for you to see this used.

Also, in mathematics, the word 'of' is 'translated" to multiply.

Example: 2 of 6 #-> 2xx6#

So #7/8# of 64 #->7/8xx64/1 color(white)("d")->color(white)("d") 7/1xx64/8 larr "notice the 1 and 8 has swapped "#

When multiplying you can change the order. Example: #2xx3=3xx2=6#

Note that #64-:8=8# giving:

#7/1xx64/8 color(white)("d") ->color(white)("d") 7xx8=56#

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Answer 2

Kennedy Adams

To find out how many students gave their speeches, you need to calculate 7/8 of the total number of students.

7/8 of 64 students can be calculated as:

( \frac{7}{8} \times 64 = 56 )

Therefore, 56 students gave their speeches.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.