Five urns are numbered 3,4,5,6 and 7, respectively. inside each urn, there are n² dollars where n is the number on the urn.
the following experiment is performed:
an urn is selected at random. if its number is a prime number the experimenter receives the amount in the urn and the experiment is over. if its number is not a prime number, a second urn is selected from the remaining four and the experimenter receives the total amount in the two urns selected.
what is the probability that the experimenter ends up with exactly twenty- five dollars?

Richard save $32 in march he saved $48 in april and $38 in may then richard spent $113 on a keyboard how much money does richard have left

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0

The height of a birch tree, f(x), in inches, after x months is shown in the graph below. how much does the birch tree grow per month, and what will be the height of the birch tree after 10 months? a. the birch tree grows 1 inch per month. the height of the birch tree will be 16 inches after 10 months. b. the birch tree grows 2 inches per month. the height of the birch tree will be 26 inches after 10 months. c. the birch tree grows 3 inches per month. the height of the birch tree will be 36 inches after 10 months. d. the birch tree grows 2 inches per month. the height of the birch tree will be 24 inches after 10 months.