The Whitakers were traveling to Sydney, Australia from New York City. but first had a layover in Los Angeles, California. The flight distance from NYC to L.A. Was 3,944 kilometers. The flight distance from L.A. to Sydney was 12,051 kilometers. About how many total kilometers did the Whitakers travel? Estimate by rounding each number to the nearest thousand. Exactly how many total kilometers did the Whitakers travel? Is your answer reasonable? Explain.

Find the absolute value of \( 5 \).

There are 250 people in a hall. \( 30 \% \) of them wear glasses. How many people do 1ot wear glasses?

\begin{tabular}{|l}\hline Concept 3.14 - More Arithmetic with Complex Numbers \\ 1. Select all expressions that are equivalent to \( 8+16 i \) \\ a. \( 2(4+8 i) \) \\ b. \( 2 i(8-4 i) \) \\ c. \( 4(2 i-4) \) \\ d. \( 4 i(4-2 i) \) \\ e. \( -2 i(-8-4 i) \)\end{tabular}

1.40 Use metric conversion factors to solve the following problems: a. The Daily Value of phosphorus is 800 mg . How many grams of phospho- rus are recommended? b. A glass of orange juice contains 0.85 dL df juice. How many milliliters of orange juice is that? c. A package of chocolate instant pudding contains 2840 mg of sodium. How many grams of sodium is that?

\( 35 \% \) of the seats in a bus are occupied. There are a total of 400 seats. How many seats are not occupied?