There are approximately 7.5×10^18 grains of sand on earth. there are approximately 7×10^27 atoms in a average human body. are there more grains of sand on earth or atoms in a average human body? how do you know?

Ben wants to play a carnival game that costs $2. in his pocket he has 5 red tickets worth 35 cents each, and 15 blue tickets worth 10 cents each. which of the following systems of inequalities correctly represents the constraints on the variables in this problem? let represent the red tickets and b represent the blue tickets.

Write an equation of a line in slope intercept form that is perpendicular to the line 2x -3y = 12 and passes through the point (2, 6).

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?