The blood types of 150 people were determined for a study as shown in the figure below.

If 1 person from this study is randomly selected, what is the probability that this Perron has either type A or type AB blood?
A.62/150
B.66/150
C.68/150
D.78/150
E.84/150

you wrote the answer for D wrong.

ANSWER: D. 73/150

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)