Question 2 (Multiple Choice, Worth 1 point): (06.03 MC) Choose the correct simplification of the expression \((5xy^5)^2(y^3)^4\). A. \(25x^2y^{22}\) B. \(10x^2y^{22}\) C. \(25x^3y^{14}\) D. \(10x^3y^{14}\) Question 3 (Multiple Choice, Worth 1 point): (06.05 MC) Aurora is selling tickets to a carnival. The function \(f(x) = 0.5x\) represents the amount of money Aurora earns per ticket, given that \(x\) is the number of tickets she sells. The function \(g(x) = 8x\) represents the number of tickets Aurora sells per hour, where \(x\) is the number of hours she works. Find \(f(g(x))\) and explain what it represents.

Mathematics · High School · Thu Feb 04 2021

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For Question 2, we simplify the expression \((5xy^5)^2(y^3)^4\) using the properties of exponents:

Firstly, \((5xy^5)^2\) involves squaring all factors inside the parentheses. This means: - The coefficient 5 is squared to become \(5^2 = 25\), - The \(x\) is squared to become \(x^2\), - And \(y^5\) is squared to become \(y^{5 \cdot 2} = y^{10}\).

So, \((5xy^5)^2 = 25x^2y^{10}\).

Secondly, we need to consider \((y^3)^4\). Raising a power to a power means you multiply the exponents: - \(y^3\) raised to the 4th power becomes \(y^{3 \cdot 4} = y^{12}\).

So, \((y^3)^4 = y^{12}\).

Now, we multiply these together: \(25x^2y^{10} \cdot y^{12}\)

When multiplying powers with the same base, we add the exponents: \(25x^2y^{10+12} = 25x^2y^{22}\)

Therefore, the correct answer is A. \(25x^2y^{22}\)

As for Question 3, we want to find \(f(g(x))\), which is a composition of functions. You find this by applying the function \(g\) first and then applying \(f\) to the result.

\(g(x) = 8x\), and \(f(x) = 0.5x\).

\(f(g(x)) = f(8x) = 0.5(8x) = 4x\)

The function \(f(g(x))\) represents the amount of money Aurora earns from selling tickets per hour. Specifically, she earns 4 dollars per hour (since \(x\) represents the number of hours she works).