How did John D. Rockefeller's purchase of a barrel-making factory contribute to the expansion of his petroleum business? A
It allowed him to reduce his cost of production.
B
It allowed him to guarantee he had the best barrels.
С
It allowed him to diversify his investments and make more money.
D
It allowed him to make enough money building barrels to buy established petroleum companies.

254.34

step-by-step explanation:

the formula for area of a circle is given by

a = pi * r^2

a = pi * 9^2

a = 81*pi

using 3.14 as an approximation for pi

a = 3.14*81

a = 254.34

lancelot said to the beautiful ellen i c u r a b u t l n (i see you are a beauty lancelot was the greatest and worst of the knights who became the king's champion and undertook quests in the king's name. he became the adulterous lover of queen guinevere, and they had a son named galahad.

can we see the cartoon?