what is the term number of 32.8 ? a + (n-1)d = termn 12.1 + (n-1)(.9) = 32.8 .9n- .9 = 20.7 .9n =21.6 n = 24 sum(24) = 12(first + last) = 12(12.1 + 32.8) = 538.8 check my arithmetic
You can ask a new question or answer this question.