2. The average adult spends 7 hours every night sleeping. If it is estimated that 20% of sleep is spent in deep sleep, how much time (in days) are spent in deep sleep each year?

5. A small ceramics museum had 5000 visitors in its first month January (1 = 0) of operation. The museum staff predicts that the number of visitors will increase by 6% each month. Assuming this prediction is true, how many total visitors should the museum expect in the 1st quarter (January, February, and March). Round your answer to the nearest whole number.

part B C

10. A sample of 50 bacteria grows exponentially and increases by 45% each hour. A) How many bacteria will there be after 24 hours? B) How long does it take for the population to double? DELL ES-CAMMP-32-L

assume that a prior surgery suggests about 33%

1) The question screenshot attached down below answer step-by-step.

2) The charcoal from a tree killed in a volcanic eruption contained 64.7% of the carbon-14 found in living matter. How old is the tree, to the nearest year? Use 5700 years for the half-life of carbon-14

2a. Assume that the world population is 6 billion people and that the birth rate is 2.25% and the death rate is 1.25%. How many years will it take in order for the population to double?

The decay rate of a certain radioactive isotope is 13% per year. a) What is its half-life? Round to the nearest tenth of a year. b) For how many years the radioactive substance will decrease from 10 grams to 3 grams? round your answer to the nearest tenth of a year.

6. The value of a car decreases by 15% every year. How long does it take until the value of the car is half its original value?