Question

The dosage in milligrams D of a heartworm preventive for a dog who weighs x pounds is given by D(x) = 25 x. Find the proper dosage for a dog that weighs 21 pounds

136
The dosage is milligrams. Type an integer or a decimal)

(ANSWER QUICKLY)

Answer 1

114.24 mg

Explanation:

Use 21 for x in the given formula:

D(x) = 136/25·x

D(21) = 136/25·21 = 2856/25 = 114.24

The dosage is 114.24 milligrams.

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Additional comment

114.24 is the value obtained using the formula. It is a decimal amount, so meets the requirement for "an integer or a decimal." As a practical matter, this is not substantially different from 114 mg, the amount rounded to the nearest integer.