The landscaper pours 200 gallons of herbicide in a pond. the herbicide degrades 10% each week. the landscaper will put another dose in the pond when the herbicide level drops below 50 gallons. in about how many weeks will he need to add more herbicide?

Abus travels 36 miles in 45 minutes. enter the number of miles the bus travels in 60 minutes at this rate.

M.xyz =radians. covert this radian measure to its equivalent measure in degrees.

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.