An artifact originally had 16 grams of carbon-14 present. The decay model A = 16e-0.000121t describes the amount of carbon-14 present after t years. How many grams-14 will be present in 5715 years?

What is the value of x divided into y - z if x = 32, y = 4, and z = 2 3/4?

80 points suppose marcy made 45 posts online. if 23 of them contained an image, what percent of her posts had images? round your answer to the nearest whole percent. 54 percent 51 percent 49 percent 48 percent

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.