Armbands machine costs 185 dollars and the material needed costs 25 cents per piece. The armband will be sold for 2.50 dollars each. How many armbands are needed to make at least 200 dollars?

Find n (A) for the set A = {300, 301, 302, ..., 3000}

Five independent flips of a fair coin are made. find the probability that (a) the first three flips are the same; (b) either the first three flips are the same, or the last three flips are the same;

Solve x^2=x+6 by factoring

What is 1.075 and 0.924 written in word form?

solve the equation 8xsquared+2x-3=0 hence solve the equation 8cos^2y+2cosy_3=0 for the range 0degrees <y <180

How can math explain so many things in the universe? How can it predict things?

What is the sum of the six term of the geometric series? 2-6+18-54

Find the value of 715*211 Although these numbers aren't quite as nice as the ones from the example, the procedure is the same, so the difficulty is the same same excepting the ability to perform the calculation in your head.

A furniture manufacturer offers bookcases in 3 different sizes and 4 different colors. if every color is available in every size, then the total number of different bookcases is

Tim has an encyclopedia in 5 volumes: A-C, D-F, G-J, K-N, and O-Z. Other than alphabetically (ascending or descending), how many ways can these volumes be arranged?