If dr. i. m. smart mixes 50ml of a 20% acid in water solution with 30ml of acid, what is the quantity and concentration of the final solution?

80ml of the solution with a 50% acid concentration.

Step-by-step explanation:

Amount of acid in the water solution:

50ml * 20%= 10 ml

∴There is 10ml of acid in the solution.

Final amount of liquid:

50ml + 30ml = 80ml

Final amount of Acid:

10ml + 30ml = 40 ml

Concentration of Acid in Solution

40ml / 80ml = 0.5 = 50%

answer: 10 turtles

step-by-step explanation: as turtles have four legs so 4.10=40 therefore birds are 4 which sue counted

i'm assuming that it's c.)   volcanoes built the mountains and earthquakes tore them down.