Answer:
a
Step-by-step explanation:
hope this helps
Answer:
Below.
Step-by-step explanation:
12. That is a semicircle
The central angle is 180 degrees.
Since the string has already two 2, then we will compute the whole number of strings whose length is 4, over the alphabet {0,1}:

There is then 16 such strings.
Answer:
1065
Step-by-step explanation:
57-42×-3-21
Answer:
8 L
Step-by-step explanation:
If x is the volume of 90% alcohol, then:
(0.90)(x) + (0)(2) = 0.72(x + 2)
0.90x = 0.72x + 1.44
0.18x = 1.44
x = 8