It is estimated that 80% of all is untreated and flows directly into the india's rivers, making it a major source of water pollution. which answer best goes into the blank in the prompt? a) erosion b) raw sewage c) pesticides d) mining surplus

Where was an independent arab state created after world war i

What causes the cyclical changes in the appearance of the moon?

One of the brightest comets of the 20th century was comet hyakutake, which passed close to the sun in early 1996. the orbital period of this comet is estimated to be about 30,000 years. find the semi-major axis of this comet’s orbit. compare it to the average sun-pluto distance and to the distance to alpha centauri, the nearest star to the sun, which is 4.3 light-years distant.