Answer:
32/21
Step-by-step explanation:
multiply (2/3) by (7/7) and (6/7) by (3/3). (14/21) + (18/21) is (32/21)
110/154 = x/126
154x/13860
x = 13860 /154 = 90
90 milligrams of medicine A
C=2

r
A=

r<span>²
C=2</span>

r=58

2r=58
r=29
A=

r<span>²
A=29</span><span>²</span>

A=841