Final answer:
The length of the iPhone is found by dividing the area, 15 1/3 square inches, by its width, 3 5/6 inches. After converting to improper fractions, the result is exactly 4 inches. Thus, the correct answer is 4 inches.
Step-by-step explanation:
To find the length of the iPhone, we can use the formula for the area of a rectangle, which is Area = length × width. We know the area is 15 1/3 square inches and the width is 3 5/6 inches. To find the length, we will divide the area by the width.
First, convert the mixed numbers to improper fractions before dividing:
- Area = 15 1/3 = 46/3 square inches
- Width = 3 5/6 = 23/6 inches
Next, divide the area by the width to find the length:
Length = Area / Width = (46/3) / (23/6) = (46/3) × (6/23) = 4
Therefore, the length of the iPhone is 4 inches.