On = a1 + (n-1)d A gym pass costs $30 for the first month. Each month after that, the cost is $20 per month. What is the cost for Issac to
swim for 12 months?
O $258
• $250
O $368
O $350

The cost for Issac to  swim for 12 months is $250.

Hence, option 'B' is true.

Step-by-step explanation:

Given that the gym pass costs $30 for the first month, so

Each month after that, the cost is $20 per month, so the sequence becomes

a₁, a₂, a₃, a₄, a₅, ...

30, 50, 70, 90, 110, ...

An arithmetic sequence has a constant difference 'd' and is defined by  

computing the differences of all the adjacent terms

The difference between all the adjacent terms is the same and equal to

now, we have

so substituting a₁ = 30 and d = 20 in the nth term of the sequence

Thus, the nth term of the sequence is:

Determining the cost for Issac to  swim for 12 months:

As we have already determined the nth term of the sequence such as

now substituting n = 12

Therefore, the cost for Issac to  swim for 12 months is $250.

Hence, option 'B' is true.

i would pic false cause it goes down towards negative

step-by-step explanation:

answer:

your answer is: c. 196 7/8 in^3.