Adrop of oil measuring 0.23 cubic centimeter is spilled onto a lake. the oil spreads out into a circular shape having a diameter of 20 cm. approximate the thickness of the film.

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

answer is b

step-by-step explanation: