At 1 pm the number of cars in a parking lot is 78. Given the formula, An=78 • 1.09^n estimate the number of cars in the parking lot at 6 pm. Round to the nearest whole number if necessary.

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.