What is the range of this numbers

Which of the fallowing best completes the sequence 5,10,15, a) 30 b) 22 c)25 d)35

Taber invested money in an account where interest is compounded every year.he made no withdrawals or deposits. the function a(t)=525(1+0.05)^t represent the amount of money in the account after t years. how much money did taber origanally invested?

If two points are given,then exactly one line can be drawn through those two points.which geometry term does the statement represent