The half-life of a radioactive element is five years. a scientist has 18 grams of the element. the equation representing the number of grams, g, after x years is what is the annual rate of decay

Kevin deposited $250 each month for the first 3 months in his savings account. Then, he deposited $302.50 each month for the next 4 months. What is the average amount that Kevin deposited each month?

Mary is 5 years older than Bob. If the sum of their ages is 39, write and solve an equation to find their ages

A class of 28 students. the ratio of girls of 3 girls 4 boys. what is the ratio for the number of boys to total number students in the class?

Find the critical value tc for the confidence level c=0.98 and sample size n=18

If the outliers are not included, what is the mean of the data set? 76, 79, 80, 82, 50, 78, 83, 79, 81, 82 A. 77 B. 78 C. 79 D. 80

Wendy's sells frosties in to sizes. A regular Frosty contains 350mL of ice cream and a large has 2/5 more. How much does a large frosty contain?

In 6-9 give the first six terms of the sequence defined by the recursive formula. the formula is given for integers n >?

What is 13% of 25.3?

An owner of a company spends $25 on office supplies. The owner is left with $20. Write an equation to find how much money he originally had.

Explain how knowing squares can make Pythagorean Theorem problems easier.