A biologist is studying diseases in chimpanzees. He takes three random samples of the same size from a troop of 150 chimpanzees. One sample indicates that 3% of the chimpanzees are hairless, another sample indicates that 5% are hairless, and a
third sample indicates that 4% are hairless. How many hairless chimpanzees
should the biologist expect to find in the troop?

Y=4x^2+x-1 solve using quadratic formula

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

Acompany manufactures three types of cabinets. it makes 110 cabinets each week. in the first week, the sum of the number of type-1 cabinets and twice the number of type-2 cabinets produced was 10 more than the number of type-3 cabinets produced. the next week, the number of type-1 cabinets produced was three times more than in the first week, no type-2 cabinets were produced, and the number of type-3 cabinets produced was the same as in the previous week.