Gwen bought a hardcover book for $16.50 not including taxes. Her mother told her the tax was 8% on all purchases. What was the amount of tax Gwen paid? ( I need thii) Answer chooses:
1.48, 1.32, 1.28, 0.88

Neveah and clint are baking muffins for the bake sale. they need to bake 30 muffins for their display case. clint has baked 4 so far, and neveah has baked 7. how many muffins (m) do they have left to bake? show your work!

Acertain population of bacteria demonstrates exponential growth doubles in size every 4 days. how long will it take the population to triple in size?

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?