The value of (12 C 3) (the number of combinations of 12 items taken 3 at a time) can be calculated using the formula (nCr = \frac{n!}{r!(n-r)!}). For (12 C 3), this becomes:
[ 12 C 3 = \frac{12!}{3!(12-3)!} = \frac{12!}{3! \cdot 9!} = \frac{12 \times 11 \times 10}{3 \times 2 \times 1} = 220. ]
Thus, (12 C 3 = 220).
=B3*C3*2
To add the values in cells C3 and C7, use the formula =C3 + C7. To multiply the value in cell C3 by the value in cell C6, use the formula =C3 * C6. You can enter these formulas in any empty cell to obtain the results.
=IF(F2>F3,D5,0)
Around 50ppm for C3 plants and around 5ppm for C4 plants.
It is 10 if a = 4 and c = 3
An apple tree is a C3 plant, which means it uses the C3 photosynthetic pathway.
C3
Cocoa is neither a C3 or C4 plant. Though it tends to live in warmer climates, it does not fit into either category.
=(C4+C12)*C3 You must use the brackets, or otherwise the multiplication will be done first. This is the laws of mathematics. See the related question below.
c3
Yes, eucalyptus is a C3 plant. C3 plants are the most common type of plants and they use the C3 carbon fixation pathway during photosynthesis.
You would use the Replace facility rather than functions. Functions cannot change the content of other cells. They can only affect the cell they are in. If you have a number in cell C3 you cannot change it by typing in a function in C3. You would be immediately replacing what is in C3 with a formula. You could put a formula in another cell that will put a number into itself based on what is in C3. If you want to change the actual contents of C3, then use the Replace facility, which you can activate by pressing Ctrl - H. You would also use it to replace the same number occurring in multiple cells. So you could replace the contents of all cells with a particular value in them with a new value.