Answer:
b
Step-by-step explanation:
Answer:
Using the formula, write in standard form. 10,55x+500
Step-by-step explanation:
The underlying arithmetic progression is
-15, 0, 15, 30, ...
starting with
and with a common difference of
between terms. Recursively, this sequence is given by

So we have



and so on, so that the explicit rule for the sequence is

for
.
The series consists of 15 terms, since

So we have

and the answer would be B.
Answer:
71.25
Step-by-step explanation:
That's the answer