!PLEASE ANSWER ASAP!

seats in a theater are curved from the front row to the back. the front row has 10 chairs, the second has 16 and the third has 22, and so on.

1. write a recursive rule for this series:

2. write an explicit rule for this series:
* if you simplify, please show all of the steps

3. using the explicit formula, find the number of chairs in row 5 (show your work):

4. the auditorium can hold 17 rows of chairs. write a sigma notation for this series, and then use either series formula to calculate how many chairs can fit in the auditorium.

on your paper it doesn't say the answer but the the answer is altitude

step-by-step explanation:

answer: 7

step-by-step explanation:

x =-.20752

step-by-step explanation:

4^(x+2)=12

4^(x+2)=12

take the log base 4 on each side

log 4 (4^(x+2) = log 4(12)

we know log b(a^y) = y log b (a)

(x+2) log 4(4) = log 4 (12)

x+2 = log 4 (12)

we know   logb c = loga c/loga b

we want to convert to base 10   so a = 10

by default, we do not write the 10   c = 4   and b = 10

log4 10 = log 12/log 4

log4 10 = log 12/ log 4

x+2 = log 12/ log 4

subtract 2 from each side

x +2 -2 = log 12/ log 4 -2

x = 1.79248125 -2

x =-.20752