A scientific experiment must be O inexpensive
O repeatable
O complicated
O hard to explain

Over the last 90 years, scientists have added to the body of evidence supporting the big bang theory. what is the latest piece of evidence discovered in 2014?

If 15 drops of ethanol from a medical dropper weight 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? the density of ethanol is 0.80g/ml

Mr. rose asked his student to draw a quadrilateral with four unequal sides. an example of this kind of quadrilateral