Jaun painted 4 portraits in 20 minutes. at that rate how many would he paint in 3 hours

36 portraits

Step-by-step explanation:

4 portraits per 20 minutes. 20 minutes x 9= 3 hours. 9x4 portraits=36 portraits.

48 portraits

Step-by-step explanation:

He can do 4 in 20 minutes. So, first figure out how many he can do in an hour. That's another 40 minutes. 40 minutes he does 8 portraits. So, 8 portraits plus 4 portraits is 16. That's one hour of painting. 16 portraits times 3 is 48, which is the amount he would paint in three hours.

-362

step-by-step explanation:

(12)(4)+2(12)-34(12)+2(12)-3

  \/         \/         \/         \/

  48 +   24 -   408 + 24 - 3

      \   /               \   /

          72     -     432 - 3 = -363

v = 1/3 a^2h

step-by-step explanation:

the volume is 1/3 a^2h.