Một hộp có 7 bi đỏ 3 bi vàng và 5 bi xanh. Có bao nhiêu cách lấy ra 5 viên bi mà trong đó: a, có đúng 3 bi xanh
b, có ít nhất 3 bi xanh

Abucket of paint has spilled on a tile floor. the paint flow can be expressed with the function p(t) = 6(t), where t represents time in minutes and p represents how far the paint is spreading. the flowing paint is creating a circular pattern on the tile. the area of the pattern can be expressed as a(p) = 3.14(p)^2 part a: find the area of the circle of spilled paint as a function of time, or a[p(t)]. show your work. part b: how large is the area of spilled paint after 8 minutes? you may use 3.14 to approximate pi in this problem.

6cm10 cma conical paper cup has dimensions as shown in the diagram. how much water can the cup hold when full?

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.