In 1900, the average life expectancy in the united states was 47.3 years. in 2015, the average life expectancy was 78.8 years. calculate the percentage increase in life expectancy from 1900 to 2015 

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

Will mark the brainliest.paula makes stained-glass windows and sells them to boutique stores. if her costs total $12,000 per year plus $4 per window for the frame. how many windows must she produce to earn a profit of at least $48,000 in one year if she sells the windows for $28 each?

What are the solutions of the equation x4 + 6x2 + 5 = 0? use u substitution to solve.