Which process cannot happen? a. Igneous rock → heat and or pressure → metamorphic rock
b. Igneous rock → weathering and erosion → burial → deposition →
cementation → sedimentary rock
c. Metamorphic rock → melting →solidification →igneous rock
d. Sedimentary rock →melting →solidification → metamorphic rock

Hi!

Option d. Sedimentary rock →melting →solidification → metamorphic rock is a process that cannot happen.

Please check the attached image for the diagram of rock cycle. In it, the sedimentary rocks melt to form magma and solidifies into igneous rocks, not metamorphic rocks

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.