Answer:
5
Step-by-step explanation:
13^2=169
12^2=144
169-144=25
Root 25 is 5
Answer:

Step-by-step explanation:
Given
Geometric Sequence (GP)


Required
Determine T₁₂
The nth term of a GP is calculated as thus;

In this case;
;
and 
Substitute these values in the above formula



Open the bracket


<em>Hence, the 12th term of the sequence is </em>
Multiply 40 by the percentage off that you have so .15. then take youre sum and subtract it from the original price to find youre sale price.
Could you please post answers