You are given the reaction cu + hno3 → cu(no3)2 + no + h2o. which pair of half-reactions represents the balanced half-reactions for the reaction? 3cu → cu2+ + 6e- 2n5+ + 6e- → 2n2 cu → cu2+ + 2e ns+ + 3e → n2 2cu → 2cu2+ + 6e 3n5* + 6e → 3n2+

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 .

It decreases by 4 is your answer mark brainliest