I got 78.66, is there an answer choice like that?
The square number is 4 hence The answer is 4
Use the formula of a triangle which is A=1/2bh
A=1/2(10 x 12)
A=1/2(120)
A=60 feet
Not necessarily. Consider the series
and
. Here
.
The first series converges by the alternating series test, which says
converges if
is a decreasing sequence and converges to 0. This is the case, as
as
, and each term is decreasing. (Indeed the series converges to
.)
On the other hand, the second series is a classic example of a divergent sum.