If your denominators are
x² + 4x - 12 = (x +6)(x -2)
and
x² + 7x + 6 = (x +6)(x +1)
Then the common denominator is the product of unique factors:
(x +6)(x +1)(x -2)
A or c am not completely sure I am 90% sure or is I
5.254071926×10^9
Standard form is taking a large number and putting it in a form where the number is smaller than 10. To do that (using the number above) you would take the first number which is 5 and then make every number after it part of a decimal. You then use [×10^x] (multiplied by 10 to the power of the amount of numbers after the decimal point (In this case 9)) to show others that to find the full number you multiply the decimal by 10 to the power of 9.
I believe the one you have selected is correct.
Answer:
I don't know if I am right or not. But I would say 702. He is planting a variety of tomatoes, no other crops are being planted except different types of tomatoes. Since they are all tomato seeds, and he is planting 702 tomato seeds.