-10grade/week
Explanation:
Given parameters:
Initial grade = 95grade
Final grade = 65grade
Time = 3weeks
Unknown parameter:
Rate of change of grade = ?
Solution:
Rate is defined as the change of a quantity with time.
Rate of change of grade = 
Rate of change of grade = 
= 
Rate of change of grade = -10grade/week
The rate of change of the student's grade is -10grade/week. It implies that the grade of the student reduces by 10unit per week.
Cellular respiration produces carbon and it’s a long process involved with the mitochondria, pretty much cellular respiration puts carbon into the air from plants.
When photosynthesis is how plants grow, by taking the sun as a energy source instead of consuming other things for energy
Make sense?
Have a good day
An educated guess is the best way to describe hypothesis
The magnetic vehicles will move closer to each other because the magnetic force will pull the vehicles together.
Carbonized remains are thin, approximately two-dimensional films of carbon preserved on a flat surface of rock. They are most often black in color, reflecting the fact that they composed mostly of carbon (as is coal, which is also black in color). Most fossils that exhibit “soft part” preservation are carbonizations.
I would say the answer is the Carbon remains of the original organism.
