Marlye posted a story on her blog. on the first day there were 80 responses and on the second day there were 180 responses. what percent is the increase, 100, of the original number of responses, 80?

Giving 100 points asap bev has to cut her grandma's grass this weekend and wants to know exactly how much area she will be cutting. calculate the area of the polygon. be sure to show all your work and explain your answer.

Marlow is comparing the prices of two trucks rental compaines company a charges $3 per hour and an addtional $75 as serivce charges company b charges $2 per hour and an additional $85 as serivce charges

What is the number 321,000,000 in scientific notation? also what is the number? ?