Correct each of the following errors by circling the error, describing what is wrong, entering what should be there instead, and entering the correct answer. (3x^{2})t(-2x^{4})=3(-2)x^{2*4}=6x^ {8}

4a^{2} * 3a^{5} = (4 + 3)a^{2+5} = 7a^{7}

x^{6} * x * x^{3} = x^{6+3} = x^{9}

3^{4} * 2^{3} = 6^{4+3}

I need this ASAP pls do soon

One side of a rectangle is 7 feet shorter than seven times the other side. find the length of the shorter side if we also know that the perimeter of the rectangle is 306 feet.

Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers.a) one of the 400 passengers is selected uniformly at random.let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem

Here is my question! jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?