Which word describes the four angels formed by the intersection of two perpendicular lines

Pls if a cow has a mass of 9×10^2 kilograms, and a blue whale has a mass of 1.8×10^5 kilograms, which of these statements is true?

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

Create a data set with 8 points in it that has a mean of approximately 10 and a standard deviation of approximately 1.