X cannot be negative, so the first option and the third option are out.
when x = 1, f(x) = -1; when x = 4, f(x) = -2 and when x = 9, f(x) = -3. Hence the last option.
Answer:

Step-by-step explanation:
Assuming the geometric series is

then nth term is
,
and the first term is found when
:

Answer:
B.
Step-by-step explanation:
$195.42 - $50 = $145.42
$195.42/30% = 136.79
Answer:
Step-by-step explanation:
The length of the airplane = 87 feet
<u>The scale </u>
- 2in = 8ft ⇒ 1 ft = 2/8 in ⇒ 1 ft = 1/4 in
<u>The length of the model:</u>
- 87*1/4 in = 21 3/4 in = 21.75 in
Correct choice is B