Robert earned $37.38 on monday, $20.46 on tuesday, and $49.84 on wednesday. he calculated that he earned $87.22 for the three days. estimate the amount robert earned. is his calculation reasonable?

What is the total surface area of this square pyramid?

Solve -.016x= -16. need solving this

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.