9. A regular pentagon is centered about the origin. Which transformation
maps the pentagon onto itself?
a. A reflection across line m
b. A reflection across the x-axis
C.
d.
A clockwise rotation of 144 degrees about the origin

The answer is D. A clockwise rotation of 144 degrees about the origin.

Step-by-step explanation:

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)

step-by-step explanation:

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