Which of the objects shown below could be sliced to create a circular cross-section?
cone, sphere, cylinder, cube, triangular prism(equilateral base), right pyramid(square base)
choose all answers that apply.

(a) (8%) compute the probability of an even integer among the 100 integers 1! , 2! , 3! , until 100! (here n! is n factorial or n*(n-1)*(n-2) *… 1) (b) (16%) compute the probability of an even integer among the 100 integers: 1, 1+2, 1+2+3, 1+2+3+4, …., 1+2+3+… + 99, and 1+2+3+… + 100

What is the difference between regular convex and concave polygons

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?