H(1) = 4
h(1)= 5 x 1 -1
=5-1
=4
hope that helps <3
Answer:
12.57
Step-by-step explanation:
10) a. 130
Step-by-step explanation:
Let x be the number of mm of pure alcohol to be added:
I will add the mm to express the volume in mm
100mm.(19%) + (100%).x mL = (100 mL+x mL).(40%).
Now right again without the %
100.(0.19) + x.(1) = (100+x).(0.4)
19 + x = = 40 + 04x
x - 0.4x = 40 - 19
0.6 x = 21
x = 21/0.6 and x = 35 mL. This te quantity of pure alcohol should to be added to get a solution at 40%.
Step-by-step explanation:
Espero que te ajude de mucho
