Gale builds a circular pen in his yard for his dog. the pen has a radius of 10 ft. there is a law in gale's town which states that all dogs must have at least 300 ft2 of room in their pen. does gales' pen meet the standards?
a) no. a = 62.8 ft2
b) no. a = 98.596 ft2
c) yes. a = 314 ft2
d) yes. a = 985.96 ft2

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)

nlgqer

step-by-step