Mike and Sam Tun laps. Mike runs a lap in 5 minutes and Sam runs a lap in 6 minutes. If Mike and Sam begin running at the same time, after how many minutes will they cross the starting line at the same time?

30 min.

Step-by-step explanation: for this, you have to find the gcf of 5 and 6, which is 30.

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)

you probably already have the answer but anyways it's b. 15.0

step-by-step explanation: