Answer:
20 elements.
Step-by-step explanation:
Lets say
n(U) = 114
n(A) = 57
n(B) = 79
n(A n B)= 42
Now,
n(A U B) = n(A) + n(B) - n(A n B)
= 57 + 79 - 42
= 94
Now,
n(A U B) compliment = n(U) - n(A U B)
= 114 - 94
= 20
Answer:
B. 8 hours
Step-by-step explanation:
T=d/r
84/10.5 = 8 hours
-77 and 7/20 is the answer simplified and without it being simplified you get -77 and 35/100
15 I think i'm sorry if i'm wrong
