Please help show all work stoichiometry limiting reactant

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .

The answer is ax3. hope this

Answer/when the cell uses energy;

Just be yourself and have fun. and asking a girl to prom is easy be spontanous and use something she likes as your promposal