What is structure 3 , and how does it help sustain life? A. Structure 3 is a mitochondrion, which is the site of cellular respiration Structure 3 is a chloroplast , which is the site of photosynthesis . C. Structure 3 is the cell wall , which gives the cell structural support . Structure 3 is the nucleus , which is the control center of the cell .

1. (1.2kw)x(15/60hours) = .3kwh --> a

2. (5kw)x(90/60hours)x(8cents/kwh) = $0.60 --> d

3. microwave --> 1200 watts = (1.2kw)x(6/60hours) = .12kwh

coffee-maker --> 900 watts = (.9kw)x(10/60hours) = .15kwh

therefore, it requires more energy for the coffee-maker to do the same amount of work.

so the answer is a.

in addition to spreading humanist ideas, erasmus has contributed to criticism of corruption in the church.