PLEASE HELP ITS TIMED I DONT NEED BIG EXPLAINATION WILL DO BRAINLIEST Let i be the imaginary number −1−−−√
. Determine whether the expression a+bi
, where a and b are real numbers, represents a real number or a non-real complex number for each case below. Select Real Number or Non-Real Complex Number for each case.

Monica build a remote control toy airplane for science project to test the plane she launched it from the top of a building the plane travel a horizontal distance of 50 feet before landing on the ground a quadratic function which models the height of the plane in feet relative to the ground at a horizontal distance of x feet from the building is shown

Ineed to know the answer to this algebra question.

Table which ratio is equivalent to 3: 7? 6: 7 3: 21 24: 56 15: 30