At the beginning of spring mckenzie planted a small sunflower in her backyard when it first planted the sunflower was 10 inches tall the sunflower then began to grow at a rate of 2.5 inches per week how tall what does sunflower be after two weeks how tall was the sunflower be after the sunflower then began to grow at a rate of 2.5 inches per week how tall what does sunflower be after two weeks how tall were the sunflower be after w weeks