Element X decays radioactively with a half life of 13 minutes. If there are 970 grams of Element X, how long, to the nearest tenth of a minute, would it take the element to decay to 98 grams?

Let the mean of the population be 38 instances of from 6" - 9" hatchings per nest, and let the standard deviation of the mean be 3. what sample mean would have a confidence level of 95% or a 2.5% margin of error?

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.