Converting a number to its scientific notation with two significant figures gives 5.5x10^3. Scientific notation is used to denote large or complicated numbers more easily. It basically involves shortening the number by moving the decimal point. A "10^n" is then included to make sure that the number is still the same. Sometimes, writing the scientific notation also requires rounding off the number.
Energy is defined as the ability to do work
A true-breeding specimen seems to be homozygous, thus, the blue color flowers must exhibit the genotype BB and the yellow ones must have possessed the genotype YY.
In the given case, when one crosses a flower with genotype BB and other with genotype YY, all the offspring will be BY. As in the next generation, all the flowers appear blue, thus, the blue allele must be dominant.