A pond has the dimensions of 25 meters long by 20 meters wide. If there are 100 frogs living in the pond, what is the "population density" of the frogs? A. 0.2frogs/sq meter
B. 0.5 frogs/sq meter
C. 2 frogs/sq meter
D. 5 frogs/sq meter

HELPP its a test!

Which statement best explains the relationship between an area is geography and the temperature of its surface water

Let the ed50 of a recreational drug be defined as the amount required for 50% of a test group to feel high or get a buzz. if the ed50 value of ethanol is 470 mg/kg body mass, what dose would a 70 kg party goer need to quickly consume in order to have a 50% chance of getting a buzz? 235 mg 470 mg 32,900 mg 35,000,000 mg

A5 mole sample of liquid acetone is converted to a gas at 75.0°c. if 628 j are required to raise the temperature of the liquid to the boiling point, 15.600 kj are required to evaporate the liquid, and 712 j are required to raise the final temperature to 75.0°c, what is the total energy required for the conversion?