Answer:
The18th term of the given sequence is -128
Explanation:
To find the 18th term of the sequence:
42, 32, 22, 12, ..., we need to find the nth term of the sequence first.
The nth term of a sequence is given be the formula:

Where a is the first term, and d is the common difference.
Here, a = 42, d = 32 - 42 = -10

To find the 18th terem, substitute n = 18 into the nth term
Answer:

Step-by-step explanation:
First find the radius

Now find the CIRCUMFERENCE

Adding 4 to both side is wrong he has to be subtract 4 to both side
First,

The volume is given by the integral (one of 6 possible combinations),
