Marissa's sunflower is 21 inches taller than her little sister. If her sister is 4 feet 3 inches tall, how tall is Marissa's sunflower in feet? Let's think first. Chain of thought:
Since 1 foot is equal to 12 inches, then 4 feet is equal to 4 x 12 = 48 inches. So, Marissa's sister is 48 + 3 = 51 inches tall. The sunflower is 51 + 21 = 72 inches tall. Therefore, the sunflower is 72 / 12 = 6 feet tall.
Therefore, the answer is 6.