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.

Solve the exponential equation. Give your answer to four decimal places when necessary. 8^(4x) = 9^x

I don't have a sample problem like this. Please show all steps.

92x x 27(3-x) = 1/9

If 4-x =1/6, what does 16x equal?

If 6x = 6,what does 6-2x equal?

I worked through it and feel like I am missing something. I got $345,799 Background for question. In 1803, the United States negotiated the Louisiana Purchase with France. The country...

Use the properties of logarithms to find the exact value of the expression. Do not use a calculator. log238 14 + log238 17 e loge2 64

If 4-x =1/6 , what does 16x equal?

27-3x =1/4

if 4-x = 1/6, what does 16x equal?

I don't understand how to set it up into a equation

The table shows the temperature of a pizza over four-minute intervals after it is removed from the oven. Time, (x) 0 4 8 12 16 Temperature, (y) 450 340 240 190 145 Enter a...

To begin a bacteria study, a petri dish had 1500 bacteria cells. Each hour since, the number of cells has increased by 2.3% . Let t be the number of hours since the...

f(x) = 4x f(x) = x to the power of 4 f(x) = 3 times x to the power of 4

evaluate.

country a has a growth rate of 2.7% per year. the population is currently 5,289,000, and the land area of country a is 27,000,000,000 square yards. assuming the growth rate continues and is exponential,...

what does the b-value represent in your experiment

Julie lends $100 to Sarah. Sarah promises that each day she will pay bakc half of what she still owes. When will julie get all of her money bakc? Explain using properties of exponential...

write in exponential form log 1/2 8 = -3

Please and thanks