Why is the product of a rational number and an irrational number irrational?

What is the prime factorization of 24?

The number of a country's unemployed workers decreased from 3.4 million to 5.5 million last yr. If the country population remained constant at 76 million, How did it's unemployment rate change last yr?

What is 8 1/3% as a fraction?

Change the decimal to a fraction and reduce. 62

A radioactive material loses 25% of its mass in 10 minutes. find its half-life.

If f (x) = square root x and g (x) = x^3-9, find the compositions f o g, g o f, f o f, and g o g.

What are the two square roots of 36

The length of the room is 25 feet longer than it is wide. The area is 176 square units. Find the dimensions of the room

what is 11m - 12 + 1 + 12m

Let A, B, C and D be sets. Prove that A / B and C / D are disjoint if and only if A ∩ C ⊆ B ∪ D