A machine can stamp 40 envelopes in 8 minutes. How many of these machines, working simultaneously, are required or needed to stamp 120 envelopes per minute?

An artist sells 4 paintings for $20 each, 4 sculptures for $60 each, and 4 photographs for $10 each at her art show. The artist sells 2 more paintings and 4 more sculptures at the same prices.

E=1/2mv^2. solve for m

If P (B) = 0.4, P (A or B) = 0.7, and P (A and B) = 0.3, find P (A).

Three brothers have ages that are consecutive even integers the product of the first & third boys ages is 20 more than twice the seconds boy age. find the age of each of the boys

Write log (x^2-9) - log (x+3) as a single logarithm.

The table below shows the relationship between the number of hours Nina worked and the number of hours Kathy worked.

Determine all of the roots (or zeros) 4x^3-4x^2-11x+6=0 if 2 is known to be one of the roots

In a small town there are two main sections called the Hill section and the Lake section. The town has a population of 4298. The number of people who live in the Hill section is 188 more than twice the number of people who live in the Lake section.

Two accounts each begin with a deposit of $5000. Both accounts have rates of 5.7 %, but one account compounds interest once a year while the other account compounds interest continuously.

Blue whales eat an average of 5,000 pounds of fish daily, with a standard deviation of 850 pounds. Approximately what percentage of blue whales eat more than 7,550 pounds of fish? 15.87% 5% 0.3% 0.15%