Max has a group of goldfish in his tank at home. He notices that they are struggling a bit. Max wants to increase their rate of cellular respiration because he thinks that it would help them to survive. Which of the following actions would potentially increase the rate of cellular respiration in the goldfish?

C. Increasing the amount of oxygen in the tank

Explanation:

If the fish are struggling or we see that they are going near the surface to breathe, that could indicate that there is not enough oxygen for the fish to breathe easily at all depths of the aquarium tank. By increasing the amount of oxygen present inside the tank we will assure that the fish have enough oxygen to live well. Not too much since too much oxygen can be bad for the fish.

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form

pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y