In a Rock cycle explain how does a a. metamorphic rock become into a Sedimentary rock.
b. Igneous rock become into a metamorphic rock.

a  When metamorphic rocks are exposed at the earth's surface, they will be broken down into sediments. After being compacted they will become sedimentary rocks.

b  When massive amounts of heat and pressure are applied to an igneous rock, it compacts and becomes a metamorphic rock.

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.