Brian sets up the distance formula to find the length, d, of the line segment. His work is shown. What error, if any, did Brian make? A. He subtracted the coordinates instead of adding them to get the distance terms.
B. The point he chose to draw the legs of the triangle does not form a right angle.
C. He incorrectly found , instead of .
D. He incorrectly squared each distance term.

Can anyone me with 32,33,36,37,and 40.

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?

Ascientist places 24 cells in a petri dish. she knows the cells grow at an exponential rate, doubling in number every hour. how long will it take (in hours) for there to be 1100 cells in the dish? time to 1100 cells: 5.51832530 hours how long will it take to reach 110 cells? time to 110 cells : 2.1963972 hours what is the average rate of change in the number of cells between 9 hours and 11 hours? average rate of change: cells per hour what is the instantaneous rate of change after 7 hours? instantaneous rate of change: cells per hour note: you can earn partial credit on this problem.