Alfred is practicing typing. The first time he tested himself, he could type 26 words per minute. After practicing for a week, h
e could type 28 words per minute. After two weeks he could type 30 words per minute. Based on this pattern, predict how fast Alfred will be able to type after four weeks of practice.
Alfred types 2 wpm faster each week: 28 wpm after 1 week, 30 after 2, 32 wpm after 3. Thus, after 4 weeks, we predict that Alfred will be able to type 34 wpm.
<span>numbers of seats in a row makes an arithmetic series
chairs in the nth row
an = 4 + 23*5 = 119
and the sum is
sn = (4 + 119) * 24/2 = 1476</span>
