If the half-life of sodium-24 is 3.1 hours, then the time it takes sodium-24 to decay from 148 grams to 5.2 grams is?

If the half-life of sodium-24 is 3.1 hours, then the time it takes sodium-24 to decay from 148 grams to 5.2 grams is?

An endangered frog species has a population of 10 000. Biologist estimate that the stock is decreasing at 3% per year. At this rate, approximately how many years will it take before only 80% of the...

Suppose 128 oz of radioactive substance decays to 28 oz in 6 hours, what is the half-life of the substance?

The number of restaurants in a city that has a 780 restaurants in 2013 increases at a rate 2.8% per year. (a)Create an exponential function of the the form Q= Q_0 \times (1+r)^t (where...

F(x)=a(1+/-R)^t

Given the following exponential function, identify whether the change represents growth or decay, and determine the percentage rate of increase or decrease. y=41(0.6)x Is it growing...

1) 2^0.3t 2) 1.2^3t 3) (1/2)^-t 4) y=5^-t please explain how it is 4 I would think it was 3

Exponential decay word problem

1. Scientists have observed that living matter contains, in addition to carbon, C 12, a fixed Percentage of a radioactive isotope of carbon, C14. When the living material dies, the amount of C12 present...

Ray Idusties bought a touch screen monitor for $850. The monitor is expected to depreciate at a rate of 35% per year. What will the value of the monitor be in 5 years?

(a) What is the exponential decay rate? Round to 5 decimal Places (b) Suppose we have 20 mg sample. How much of the sample will remain after 3000 years? Round to two decimal places

I don't know what exact formula to use. i know 5% is .05 and 7 years is the Time. I'm not sure how to find the half time in years with the given.

Exponential growth or decay? Write a function that represents this situation: Initial Amount = ?? Growth\Decay Rate: Percent=?% Decimel=?.? Answer:

under certain water conditions, the free chlorine in a swimming pool decomposes according to the law of uninhibited decay. after shocking his pool, Ben tested the water and found that the free chlorine...

what is the percentage of decay for the years

A. construct a model to represent the atmospheric pressure at a given altitude in thousands of meters? B. How many atmospheres of pressure will you feel at 5,895 meters? (Top of Mt. Kilimanjaro) C...

For my maths assignment, i had to do an experiment using a pendulum and measuring the amplitude of every 10 swings up to the 80th swing. One of the questions is find the ratio between consecutive...

Problem about exponential decay.

Goods costing $26.94 at the beginning of the year 1961 cost $174.82 at the beginning of the year 2004. Find the average annual inflation rate over this time period. Express your answer the nearest...

I need use this formula to find when the population will reach 7 billion

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