Ms Davis has 6 red pens, 4 blue pens and 8 black pens. All of her pens are the same size She puts all of them in a bag What is the probability that she will draw a blue pen?

A. 14/18

B. 4/14

C. 4/18

D. 6/12

A scientist has 350 mg of a radioactive material. The material will cut in half every month. After how many months will there be. 68mg left?

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Abby is infected by a certain fungal infection. When she goes to the doctor, the population fungus is 4 million. The doctor prescribes an anti-fungal that reduces the fungus population to of its size each 5 day.

Select two ratios that are equivalent to 4:18. Choose 2 answers: (Choice A) 1:3 (Choice B) 2:9 (Choice C) 18:4 (Choice D) 10:80 (Choice E) 8:36

93*10 of 6th power whole number

1) What is 61% of 7.2?

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