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Chapter 5: Problem 26
Write each number without exponents. $$ 8.8 \times 10^{6} $$
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In each polynomial, add like terms whenever possible. Write the result in descending powers of the variable. $$ -3 m^{5}+5 m^{5} $$
Write each number in scientific notation. $$ -25,000,000,000 $$
Use scientific notation to calculate the answer to each problem. The body of a 150 -lb person contains about \(2.3 \times 10^{-4} 1 b\) of copper. How much copper is contained in the bodies of 1200 such people?
Find each product. $$ p(3 p+7)(3 p-7) $$
The polynomial equation $$ y=-0.0545 x^{2}+5.047 x+11.78 $$ gives a good approximation of the age of a dog in human years y, where \(x\) represents age in dog years. Each time we evaluate this polynomial for a value of \(x,\) we get one and only one output value y. For example, if a dogs is 4 in dog years, let \(x=4\) to find that \(y=31.1\) (lirify this, This means that the dogs is about 31 yr old in human years. This illustrates the concept of a function, one of the most important topics in mathematics. It used to be thought that each dog year was about 7 human years, so that \(y=7 x\) gave the number of human years for \(x\) dog years. Evaluate \(y\) for \(x=9,\) and interpret the result.
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