Answer:
90 degrees
Step-by-step explanation:
angle b is 180-90-56=34 degrees
that means angle c is also 34 degrees.
56+34=90, thus angle BCE is also 90 degrees
It's pretty simple if you just read through it carefully. Here you go.
You can't answer this you have no actual information. You don't know how many assignments there are.
a/2 would be the only possible answer
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.