Iridium is a radioactive element used for therapy in nuclear medicine. It decays to ½ or 2-1, of its original mass after 74 days. After 148 days, it decays to ¼, or 2-2, of its original mass.  What fraction remains after 222 days? Write fraction as a power of 2 with a negative exponent also. What fraction remains after 370 days? Write fraction as a power of 2 with a negative exponent also.

Q: -2/3 12 Simplify: (x*y*) -1/4 ,4

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Q: 7/13p=-14/11

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Q: Find the simplest form for each of the following fractions. 2 a-b a. b. 2 8a + 8b 2 35x y 2 45xy a.…

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Q: -1/7x=16

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Q: 1/3y-9=1/10y

A: Here given as 13y-9=110y Here y is not equal to 0 and 3.

Q: 24 + 0.44x = 19 + 1.69x

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Q: Simplify 13/7 - 2/5

A: The given expression is 137-25

Q: Evaluate ∑8 i=1 −3 × (−5)i−1

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Q: x/5 + 8 = 1/20 Simplify.

A: The given equation is,

Q: 0.4r-0.13-0.7r=3r-5.74

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Q: 5 1/6 - 2 1/3

A: Given that 5 1/6 - 2 1/3

Q: is 3 +, 20- 37 1 (-1)" n=0 years old. How old am 1?

A: Given the age of the person is 3+∑n=0∞20(-1)n3n-1 years old. Evaluation of summation term:…

Q: 6x 0 < * = 5e

A: we can see from the graph

Q: 0.4-0.021 V0.02)(1-002) 250

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Q: What power of 10 can you multiply both 1.20 and 0.20 by to get a whole number?

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Q: х -0.4 -1.5 -0.2

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Q: 13 2/2

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Q: 7/8 Fraction as a decimal.

A: Given:

Q: 57-x =1/125

A: