What would be the radius r of a sphere of neptunium-237 that has a critical mass?

What is 5 times 5 squared

The density, d, of an object can be found by using the formula d=, where m is the mass of the object and v is its volume. What is the density of an object that has a mass of 73,430 kilograms and a volume of 7 m^3?

Rename each additive inverse without parentheses - (-2a + 3b)

What is the answer to y greater than or equal to - 5

Which of the following is an extraneous solution of sqrt 4x + 41 = x+5 A. x=-8 B. x=-2 C. x=2 D. x=8

How many people are between 159 cm and 179 cm

What fraction is equivalent to 5.1? is 5.1 a rational number?

Natalie has a choice of three breads, five choices of meats, and four choices of cheese to make a sandwich. how many different sandwiches can she make?

What is the area of this triangle 12 inches and 3 inches

Write as an expression and simplify: the tripled product of 6a and b^2