Carl puts 1.10 in his penny bank every day in the month of july (31 days). his total savings was $55.00 at the end of june. what's the best estimate for carl's saving at the end of july?

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b