1 litre of 10% solution contains 100mL of iodine
1 litre of 90% solution contains 900mL of iodine
Mixing them will produce 2 litres of solution containing 1000mL of iodine which is 50% iodine.
To produce 8 litres of 50% iodine they can mix 4 litres of 10% and 4 litres of 90%
Okay so the formula for speed is speed = distance divided by time so 120 /4 is 30 for the first bar
6/9=x/21
x=21*6/9
=126/9
x=14
Answer:
Associative Property
Step-by-step explanation: