Out of 21 cookies 2/3 are chocolate chips how many cookies are chocolate chip

2/3 of 21 chocolate chips = 14

Step-by-step explanation:

Total cookies = 21

Chocolate chips = 2/3 of 21

                       =  2/3 x 21

                       = 14

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)

i will pick c put check it over to be sure

step-by-step explanation: