if you get right. 15 points Donald Duck can make 20 pancakes in one hour. In the

second hour, his productivity increased, and he was able to make 28

pancakes. By what percent did his productivity increase?

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

ok

step-by-step explanation:

answer: i think it is (1,-2)

answer: 2530

hope this