Not sure is this is right but if the chemist wants to make the solution 35% acidic then he can use all of the 30% acid and 5% of the 45% acid.
Answer:
C. 
Step-by-step explanation:
The radius of the circle is 24 units, then the area of the whole circle is

The shaded circle is limited by 45° angle, so its area is
of the area of the whole circle.
The area of the shaded circle is
Answer:
Step-by-step explanation:
1. Angle DEF
2. Definition of congruent angles
3. The measure of angle GHI
Answer:
A and B and C
Step-by-step explanation: