What is half-lenght?

What happens when a cylinder misfires? What is 12.54 as a fraction in simplest form? Is 504 divisible by 9? What number is in the middle of -7 and 6? Write 10 lines on why I should be in safety patrol? What day of the week was July 20 1968? 23 equals 7x plus 7x-5? What is the scientific notation for 368500? What is the function of a caspase? What is a zygote formed by the union of two haploid from the opposite sexes called? How can 4 plus 4 plus 5 equals 449? What is the difference between solid shapes and solids? Is 750 milliliters bigger than 1 liter? How did merchants solve the problem of theft while on the road? What is 144 over 169 in simplest form? What is 50000 plus 900000? What are the multiples of 3 up to one thousand? The sum of what two integers is -3? What takes 8 months to do? Should there be a comma before and?