Duane and thad plan on retiring 27 years from today and plan to have the same amount saved at that time. in preparation for this, duane is depositing $15,000 today at an annual interest rate of 5.2 percent. how will thad's deposit amount vary from duane's if thad also makes a deposit today but earns an annual interest rate of 6.2 percent?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.