Katie is selling lemonde for $1.50 per cup. she decides to put them on sale for .90.what percent discount did she give on her lemonade?

Acertain population of bacteria demonstrates exponential growth doubles in size every 4 days. how long will it take the population to triple in size?

Im literally having a mental breakdown

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?