Concept explainers
OTHER APPLICATIONS
Evolution of languages The number of years
Where r is the proportion of the words from the ancestral language that are common to both languages now. Find the following.
d. How many years have elapsed since the split if
e. if two languages split off from a common ancestral language about
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Calculus For The Life Sciences
- Depreciation Once a new car is driven away from the dealer, it begins to lose value. Each year, a car loses 10% of its value. This means that each year the value of a car is 90% of the previous year’s value. If a new car was purchased for $20,000, the value at the end of the first year would be $20000(0.90) and the value of the car after the end of the second year would be $20000(0.90)2. Complete the table shown below. What will be the value of the car at the end of the eighth year? Simplify the expression, to show the value in dollars.arrow_forwardHeart Disease In a certain country, the number of deaths due to heart disease decreased from 235 in one year to 221 in the next year. What percentage decrease in deaths due to heart disease does this represent?arrow_forwardCarbon Dating The ratio of carbon-14 to carbon-12 in a piece of wood discovered in a cave is R=1/814. Estimate the age of the piece of wood.arrow_forward
- Carbon Dating The ratio of carbon-14 to carbon-12 in a piece of paper buried in a tomb is R=1/1311. Estimate the age of the piece of paper.arrow_forwardThe average percent defective product of a manufacturing plant is 1.20%. On a particular day 50 pieces were rejected out of a total daily production of 2730 pieces. What is the percent increase of defective pieces for the day above the average percent defective? Round the answer to 2 decimal places.arrow_forwardUsing the data in Example 12, how much radon-222 will remain after one year?arrow_forward
- Decibel Scale The drilling of a jackhammer was measured at 132 dB. The sound of whispering was measured at 28 dB. Find the ratio of the intensity of the drilling to that of the whispering.arrow_forwardGeorge Reserve Population The number of deer on the George Reserve t years after introduction is given by N=6.210.035+0.45tdeer. a. How many deer were introduced into the deer reserve? b. calculate N(4) and explain the meaning of the number you have calculated. c. Find the carrying capacity for deer in the reserve. d. Explain how the population varies with time. Include in your explanation the average rate increase over each 2-year period for the first 8 years.arrow_forwardChanging UnitsA certain quantity has a yearly decay factor of 0.99.What is its century decay factor?arrow_forward
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