Krypton-85 has a half life of 11 years. If a scientist has 500 grams of Krypton-85 in her lab and she decides not to use any for her experiments how much will remain after 50 years? (round to the nearest gram)

A locker combination has two nonzero digits, and the digits can be repeated. The first number is 3. What is the probability that the second number is 3?

How do you find the area of a circle? How do you find the circumference of a circle? What information do you need in order to find the area or circumference of a circle?

2 + (x+y) = (2+x) + y is and example of which algebraic property? A) Distributive property B) Associative property of addition C) Commutative property of addition D) Symmetric property

A block with a surface area of 4 m2 is pressed against the ground using a force of 100 N. Calculate the pressure.

The perimeter of the rectangle is 34 cm. The perimeter of the triangle is 30 cm. Find the value of m. a. 5 cm b. 7 cm c. 6 cm d. 8 cm

Is f (x) = - 3 an odd function?

Evaluate each expression if x = - 2, y = - 3, and z = 5. 2x + 3y + z x - y 2 3x2 - 2x + 1 3y (x + x2 - y)

What is the approximate value of log 12 if log 2 = 0.301, log 3 = 0.477, and log 6 = 0.778

Boxes of 6 ‑inch slate flooring tile contain 40 tiles per box. The count X is the number of cracked tiles in a box. You have noticed that most boxes contain no cracked tiles, but if there are cracked tiles in a box, then there are usually several.

How to divide 8.4 and 0.3