A toxic radioactive substance with a density of 8 milligrams per square centimeter is detected in...

Question:

A toxic radioactive substance with a density of 8 milligrams per square centimeter is detected in the ventilating ducts of a nuclear processing building that was used 35 years ago.

The density of the radioactive substance when it was deposited 35 years ago was approximately _ mg/cm

Between 2005 and 2009, the average rate of inflation was about 2.8% per year. If a cart of groceries cost $180 in 2005, what did it cost in 2009? A cart of groceries cost approximately$_ in 2009. (Round to the nearest two decimal places as needed)

Suppose your dog weighs 3.5 pounds at birth and weighed 15.2 pounds one year later. Based on these two data points,find a linear function that describes how weight varies with age. Use this function to predict your dog's weight at four and ten years of age. comment on the validity of this model.

The equation used to model this situation is _ where the W is the weight of the dog in pounds and t is the time in years.

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