Reorder from least to greatest.
4, 4, 6, 6, 6, 8, 10, 15, 15
/\
|
Median is the middle number.
This would be 6.
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hope it helps
(i) Yes. Simplify
.

Now compute the limit by converting to polar coordinates.

This tells us

so we can define
to make the function continuous at the origin.
Alternatively, we have

and

Now,


so by the squeeze theorem,

and
approaches 1 as we approach the origin.
(ii) No. Expand the fraction.

and
are undefined, so there is no way to make
continuous at (0, 0).
(iii) No. Similarly,

is undefined when
.
7(7a-9)>84
first multiple out to get rid of the parentheses
49a - 63 > 84
add 63 to both sides
49a > 147
Divide by 49 and flip the sign because when you divide a inequality you have to flip the sign
a < 3