Why is it important sperm and the egg to each be haploid before they fuse to become the zygote?

It is imporant as being haploid means that when they fuse together they produce a diploid cell. If they were not hiploid it would mean that the resulting cell would have to many chromosomes.

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.