The amount of water surface area on Earth is 140,000,000 square miles. How is this number written in scientific notation? 1.4 x 10⁸ C. 14 x 10⁷

14 x 10⁸ D. 1.4 x 10⁹

Draw a tape diagram to represent each situation.for some of the situations,you need to decide what to represent with a variable andre bakes 9 pans of brownies.he donates 7 pans to the school bake sale and keeps the rest to divide equally among his class of 30 students