Answer:
I can only answer one of them
Step-by-step explanation:
“1. If the top ten nations were randomly selected to march, one after another, into the stadium at the closing ceremonies, in how many ways could the nations have marched in?”
they can March in 4 ways
1. Straight
2. Left
3. Right
4. Round
Let x, y, z ∈ C, the set of complex numbers.
By definition of ○,
(x ○ y) ○ z = (x + y - 2i) ○ z
… = (x + y - 2i) + z - 2i
… = x + y + z - 4i
and
x ○ (y ○ z) = x ○ (y + z - 2i)
… = x + (y + z - 2i) - 2i
… = x + y + z - 4i
so (x ○ y) ○ z = x ○ (y ○ z), which means ○ is indeed associative under C.
Answer:
108.90
Step-by-step explanation:
You start with finding
10
%
of
90
.
$
90
⋅
.1
=
$
9
You add the money and the interest to get
$
99
for the first year. However, the next year is different. It's compound interest, so you have to multiply
10
%
by
$
99
.
$
99
⋅
.1
=
$
9.90
$
99
+
$
9.90
=
$ 108.90 The total would then be $
108.90 i think lol
