Why do your 552 missfire sometime?

What is the volume of a propane tank of cylindrical length 8 ft and 3 ft radius? How do you know if angles are congruent? How do you say this number in words 98024811? Can a line be in two quadrants? Which is greater...45 hundredths or 6 tenths? Is negative 0.5 greater than 0.5? What are the four forces that shape development? What is the standard notation for 80.62 million? What is 1.75 rounded to the nearest tenth? What is the scientific notation of 108 200 000 km? What is the half of 193? If 2 plus 3 equals 10 and 7 plus 6 equals 63 and 6 plus 5 equals 66 and 8 plus 4 equals 96 then 9 plus 7 equals what? How many sides and vertices does a quadrilateral have? What is the best estimate for the product of 1961 and 41? Is 44 a square number? Multiples for 4 AND 3? How do you read the decimal 8.517? What is 89 divided by 8 percent? Is 555 rounded to nearest to 100 600? What is 1999999999 times 1999999909999?