A set of four stars form the shape of a rectangle in space. The length of the rectangle is approximately 3,590,000,000 miles, while the width of the rectangle is approximately 34,900,000 miles. What is the approximate area of the rectangle? A. 1.25291 × 1016 square miles B. 1.25291 × 1017 square miles C. 12.5291 × 1015 square miles D. 1.25291 × 1063 square milesA scientist uses a substance called phenol red to measure the pH of solutions in his laboratory. Solutions that have a pH below 6.8 appear yellow when phenol red is added. Solutions that have a pH above 8.4 appear red when phenol red is added. For pH values between 6.8 and 8.4, solutions will appear orange.

Today, the scientist is using phenol red to track pH changes in a neutralization reaction. A neutralization reaction is a chemical reaction in which an acid and a base react to produce salt and water. Examine the scientist's neutralization reaction below, and then answer the questions that follow.
sulfuric acid + ammonium hydroxide → ammonium sulfate + water

If the scientist adds phenol red to the ammonium hydroxide solution (pH = 11.6) before adding the sulfuric acid to the ammonium hydroxide, the ammonium hydroxide solution will appear _______.

After sulfuric acid is added to the ammonium hydroxide, they undergo the above neutralization reaction. The solution that results will appear _______.
A.
yellow; red
B.
orange; red
C.
red; yellow
D.
red; orange