What is the square root of negative one? Explain?

The half life of carbon-14 is 5,730 years, assuming you start with 100% of carbon-14, what is the expression for the percent, p (t), of carbon-14 that remains in an organism that is t years old and what is the percent of carbon-14 remaining (rounded

How many possible outcomes are there when Sharya spins the spinner shown below twice?

Molly has $45 in her wallet, which is 3 times as much money as her brother has. Write an equation to represent this situation, where a represents the amount of money Molly's brother has.

Find the slope of the line that passes through (-20, - 51) and (31, - 75).

Alex has three less than four times as many baseball cards as his brother jon. If they have 407 baseball cards. how many does each brother have?

On three examinations, Dana received scores of 84, 89, and 78. What score does Dana need on the fourth examination to raise his average to 85?

You have a Spanish meeting every forth day and a math club meeting every tenth day. Today you have both meetings. In how many days will you have both meetings on the same day again?

5.2 turned into a fraction in simplest form.

A certain laptop is really popular and sells for $199.99. Since sales are so good, the store raises the price by 13%. What is the cost of the laptop after the markup?

Which statement is correct? (2.06 times 10 Superscript negative 2 Baseline) (1.88 times 10 Superscript negative 1 Baseline) less-than StartFraction 7.69 times 10 Superscript negative 2 Baseline Over 2.