chem
What does the concentration of the benzoic acid in the original liquid and the extracting liquid relate to after the extraction is completed? Answer a. The density of the original liquid. b. The density of the extracting liquid. c. The solubility of benzoic acid in each liquid...
mathematics
Mr. Collins is buying trsin tickets for $42 each. What is the total cost of the tickets? Use the distributive property to solve.
Physics
A 4.2 × 10^3 kg car accelerates from rest at the top of a driveway that is sloped at an angle of 18.4◦ with the horizontal. An average frictional force of 4.1×10^3 N impedes the car’s motion so that the car’s speed at the bottom of the driveway is 4...
Chemistry
What is the density of 3.40 liters of hci
Physics
A spring has a a constant of 650 N/m. How far must it be compressed to push a 4kg object on a friction-less surface to 3 m/s?
Math
This is from the actual problem - A consumer product testing lab tested 400 13-watt compact fluorescent light bulbs by turning them all on at once, leaving them on until they burned out, and recording the time-to-failure of each bulb. The test revealed a symmetric and mound-sh...
Math
What is the approximate percentile rank of a lightbulb that failed at 9000 hours if the number of lightbulbs is 400? The number of lightbulbs that lasted between 5400 and 9000 were about 326 lightbulbs. The mean is 7800 and the standard deviation is 1200 My guess was: percenti...
Math
The amount of a monthly electric bill (B, measured in $) depends on the amount of electricity used that month (E, measured in kWh). A typical public utility charges $0.12 per kWh for the first 300 kWh used, $0.17 per kWh for the next 600 kWh used, and $0.29 per kWh for any exc...
social studies
What is the population of:Nile Valley,Ganges Valley and Eastern China
Math
ah, thanks... i'm only taking "liberal arts math", so have only done a little bit of calculus. how did you get this part? H(.2559) = appr 319.7 H(.744) = appr 312.7
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