What is the product of −225 and −356 ? −915 −6730 613 915

Landon wrote that 3−2.6=4. which statement about his answer is true?

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.

Tan198=asin164=? how to solve this? ?