What is C13-14 Isoparaffin?

Why does the addition of a negative integer and its positive counterpart equal 0? Examples of figures with horizontal and vertical symmetry? Why aren't students good at math? How do you shorten must not? What number is the multiplicative identity for every number? What dividing what equals 24? What does the word identity in addition mean? can 60 go into 72? What is first in positive and negative decimal numbers? What is the number where the digit product is 504? 430 Meters equals how many acres? What is the answer for 45 is 25 percent of what number? How do you write 100.02 in word form? What is 7 times 389? What does a ratio compare? Why were cubits and feet first used to measure? What is the significance of christingle? What is a preventative measure mean? How many different meanings does the word compound have? What is x to the power of 8 over x to the power of -3?