maths watch: it's about a parallelogram I need to figure out its area but I'm finding it a little confusing someone please help

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

To prove that def ~ gfh by the sss similarity theorem using the information provided in the diagram, it would be enough additional information to know that

Campus rentals rents 2 and 3 bedrooms apartments for $700 ans $900 a month respectively. last month they had six vacant apartments and reported $4600 in lost rent. how many of each type of apartment were vacant?