Tc-99m is used to detect tumors in the body. The half life of Tc-99m is only 6 hours. Suppose an initial dosage of 20 mCi was administered. Find the rule.

Tc-99m is used to detect tumors in the body. The half life of Tc-99m is only 6 hours. Suppose an initial dosage of 20 mCi was administered. Find the rule.

This is talking about approximate doubling time and half-time decrease

A certain species of animal is endangered and its numbers are decreasing 11% annually. There are currently 440 animals in the population. Which is an exponential function representing the population...

Write the smallest possi whole number answer.

I need to find a formula for f-1(t) do I set the funtion =0 =x or what?

Create a formula then find the temp of the pie after 120 minuites

Use: A=A0ekt 5 years ago the population was at 1640 and today only 880 of the birds are alive. Once the population drops below 230, the situation will be irreversible. When will this happen? Hint:...

compounded seminannually: compounded monthly: compounded quarterly: compounded continuously:

The accumulated value of the 9.45% investment is . The accumulated value of the 9.5% investment is . The investment at ______% compounded _______ yield a greater return.

A study is done on the population of a certain fish species in a lake. Suppose that the population size P(t) after t years is given by the following exponential function. P(t)= 280(0.81)^t. What percent...

I keep getting the wrong answer.. not sure if it goes to 4%? idk

Not sure what the equation equals out to; the base is y=a(1+r/n)^nt

In a competition , four schools compete, and the winner advances to the next round. Therefore, after each round only .25 schools remain in the competition for the next round. Suppose 256 schools start...

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

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

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...

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