PLEASE HELP

Jacob estimates the square root of 50 in the following way:

explain why his reasoning is incorrect

estimate the square root of 75 to the nearest thousands place show your work

note: if you use your calculator you will be wrong

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15