Robert drew a circle and labeled the circle s. He used the expression 12pi to find the circumference of the circle in meters. Which is the following could be the circle Robert drew?

sorry I don’t have the answers but did you get the answer?

Step-by-step explanation:

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)

60: 45 =12: 9 =4: 3 so the answer is 4: 3