Answer:
6.
Step-by-step explanation:
1) OA=d/2=20/2=10;
2) AB=AC/2=16/2=8;

Answer:
domain is all real number
Answer:
40°
Step-by-step explanation:
360-156-124=80
80/2=40
No. A multiple of ten and a multiple of ten will always have at least 2 zeros.
X gallons of a 60% acid solution contains 60%×x=0.6x gallons of acid.
50 gallons of a 24% acid solution contains 24%×50=0.24×50=12 gallons of acid.
After mixing, there will be x+50 gallons of a solution, and 0.6x+12 gallons of acid. The concentration must be 50%, so the volume of acid divided by the volume of the solution is 50%, or 0.5.

The answer is A. 130 gallons.