Kerri drives 150 miles to visit her grandmother. she starts off driving 60 miles per hour, but then encounters road construction and has to drive 20 miles per hour the rest of the way. if she spends the same amount of time at the faster speed as at the slower speed, then how many hours did her 150-mile trip take in total?

What statement is true? 2x^2-9x+2=-1

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.

Ascientist has discovered an organism that produces five offspring exactly one hour after its own birth, and then goes on to live for one week without producing any additional offspring. each replicated organism also replicates at the same rate. at hour one, there is one organism. at hour two, there are five more organisms. how many total organisms are there at hour seven? 2,801 19,531 19,607 97.655