C. How many years before half of the plutonium is gone?

Your answer

How many steps does a walker average in 30 minutes?

30 divided by 8 using long division with remainder

A farmer intends to plant pine trees 12 feet apart to form a windscreen for her crops. How many trees should she buy if the length of the field is 804 feet? 792 Incorrect: Your answer is incorrect. trees

42 less than the product of 28 and an unknown number is 154. What is the value of the unknown number?

How do we find what percent of 45 is 72

B=100-10x^2 it costs the company $60

Simplify, write each answer in scientific notation (7.4 x 10) ^2

2. What are the means of the following proportion? 3/15 = 12/60 A. 15 and 12 B. 3 and 15 C. 3 and 60 D. 12 and 60

A virus consists of

A certain type of water lily doubles the area it covers every year. Ten years after being planted in our lake the water lilies cover a quarter of the lake's surface. How many more years will it be before they cover the entire surface of the lake?