13. The students in charge of the class booth at a carnival would like
to earn $3 for every item they sell. They spent $55 for the materials
to make the items. Solve the inequality 3x – 55 2 65, which
represents how many items they need to sell to make a profit of at
least $65.

For which rational expression is -2 an excluded value of x?

(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

Use the net as an aid to compute the surface area of the triangular prism. a) 550 m2 b) 614 m2 c) 670 m2 d) 790 m2