Asubstance with half life is decaying exponentially. if there ate initially 12 gramss of the substance and aftwr 70 minutes there are 7 grams after how many minutes will thrre be 2 grams remaining? round your answer to the nearest while nimber

Find the slope of the line y =8/9x + 1.

Luisa sells stuffed animals. she sells her stuffed elephant for $34.90, and the sales tax is 6% of the sale price. about how much is the sales tax on the elephant?

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.2 days and a standard deviation of 1.7 days. what is the probability of spending more than 2 days in recovery? (round your answer to four decimal places.)