A. 120 square centimeters B. 88 square centimeters
C. 72 square centimeters
D. 64 square centimeters

C

Step-by-step explanation:

you could simply do 12 times 10 and then subtract it from 8 times 6 to find your answer. hope this helped :)

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)

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step-by-step explanation:

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