Here’s questions 3, and 4. Help please

Alicense plate is to consist of 44 digits followed by 55 uppercase letters. determine the number of different license plates possible if the first and second digits must be? odd, and repetition is not permitted.

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1