Question 11 0/1 pt 0 3 99 0 Details The pH scale for acidity is defined by PH = - login [H * ] where [H * ] is the concentration of hydrogen ions measured in moles per liter (M). A solution has a pHI of 3.35. Calculate the concentration of hydrogen ions in moles per liter (M). Write the answer in scientific notation - with at least 3 decimal places. The concentration of hydrogen ions is moles per liter. Enter scientific notation as follows: 1E - 14 would be entered as 1*10*-14 Submit Question Question 12 0/1 pt 0 3 2 99 0 Details The loudness of sound in decibels perceived by the human ear depends on the intensity levels according to L = 10 log I To Find the decibel level when I is 10, 000, 000, 000 times Io The decibel level is when I is 10, 000, 000, 000 times To Question Help: B Written Example Submit QuestionQuestion 13 0/1 pt O 3 2 99 0 Detai A storage tank contains a radioactive element. Let p = f(t) be the percentage of the element that remains at t years since the element was placed in the tank. A graph of f is shown in the figure. P 100. 90 80 Percent 60- 50 40 30 20 10 5 10 15 20 25 30 35 40 45 50 t Years Q What is the half-life of the element? years What percentage of the element will remain in the tank after 50 years?Question 14 0/1 pt 0 3 99 0 Details A storage tank contains a radioactive element. Let p = g(t) be the percentage of the element that remains at t years since the element was placed in the tank. Some values of g are shown in the table. Year Percent T. g(t 0 100.0 70.7 50.0 35.4 25.0 17.7 6 12.5 What is the half-life of the element? years What percentage of the element will remain in the tank after 8 years? Submit QuestionI Question 15 E m1 pt '5) 3 E 99 G) Details In the year 2009, the age-adjusted death rate per 100,000 Americans for heart disease was 226. In the year 2012, the age-adjusted death rate per 100,000 Americans for heart disease had changed to 216.1. a] Find an exponential model for this data, where t = 0 corresponds to 2009. {Round numbers to 5 decimal places.) m = bi Assuming the model remains accurate, estimate the death rate in 2032. {Round to the nearest tenth.) Submit Question . Question 1f: E 0H pt '0 3 3 '99 (D Details Find the time required for an investment of 4,000 dollars to grow to 9,000 dollars at an interest rate of 3'96 per year, compounded monthly. Give your answer accurate to 2 decimal places. Question Help: El Video Submit Question ' Question 1? E 0E1 pt '0 3 3 '99 G) Details The formula for determining the mortgage payment is given by: Loan Amount * (\"r) Monthly Payment: _ at 1-00:) '\" t n r 2 interest rate 11 2 payments per year t = number of years Suppose you want to buy a house or condominium and the loan amount is $400,000. If the annual interest rate is 5.296, and you are able to pay $2496 each month, how.r long will it take you to pay it off?? {Round to one tenth of a year} Submit Question ' Question 18 E 0\" pt '0 3 3 '99 G) Details Agiyen sample currently contains 25 bacteria. The number of bacteria triples every 3 hours. How.r long does it take for the number of bacteria to double? Question 19 0/1 pt 0 3 2 99 0 Details On April 1st, 2020 there were 736 COVID-19 cases recorded in Oregon state. And on April 30th (29 days later), there were 2,510 cases. (Source: KGW8 News) Assume exponential growth. Use this data to determine what day in May the number of recorded cases should have been 3400. According to an exponential model, the number of cases should have reached 3400 on May 2020. (Round so there are no decimals in your answer.) Submit