Abacteria culture begins with 13 bacteria which triple in amount every hour. how many bacteria exist in the culture at the 11th hour?

Me because some of question i don’t understand

Find the area of a parallelogram with the given vertices. p(-2, -5), q(9, -5), r(1, 5), s(12, 5)

The formula for the lateral area of a right cone is la = rs, where r is the radius of the base and s is the slant height of the cone.which are equivalent equations?