In the data set shown below, what is the value of the quartiles? {73, 98, 99, 99, 105, 108, 109, 109, 110, 110} A. Q1 = 98.5; Q2 = 106.5; Q3 = 109.5 B. Q1 = 99; Q2 = 106.5; Q3 = 109.5 C. Q1 = 99; Q2 = 106.5; Q3 = 109 D. Q1 = 99; Q2 = 106.5; Q3 = 99

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

5500 dollars is placed in an account with an annual interest rate of 6.5%. to the nearest tenth of a year, how long will it take for the account value to reach 19700 dollars?

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?