The answer is 12 ÷ 4 + 13 > 2 + 22 ÷ 2
Answer:
50.13
Step-by-step explanation:
The answer is C.
5c+2w= 12
(5 x 2 )+(2 x1)=12
10 + 2 = 12
7c + 4w=15
(7x1) + ( 4x2) = 15
7 + 8 = 15
Hope this helps. :)
Answer: 248mL
Step-by-step explanation:
Given:
Concentration of buffer solution Cs = 1.24%w/v of boric acid
Concentration of boric acid solution Cb = 5 % w/v boric acid
For 1 liter of buffer solution, the weight of boric acid needed is:
mb = 1 × 1.24 = 1.24 unit weight
mb = Cb × Vb .....1
Cb = concentration of boric acid solution.
Vb = volume of boric acid solution needed.
mb = weight of boric acid needed.
From equation 1.
Vb = mb/Cb
Vb = 1.24/5
Vb = 0.248L
Vb = 248mL
27,632in.2
A=2πrh+2πr2=2·π·44·56+2·π·442≈27646.01535