What; percent of 400 is 360

Which expression gives the area of the triangle shown below

The midpoints of the sides of the large square are joined to form a smaller square. what is the area of the smaller square

Katie wants to collect over 100 seashells. she already has 34 seashells in her collection. each day, she finds 12 more seashells on the beach. katie can use fractions of days to find seashells. write an inequality to determine the number of days, dd, it will take katie to collect over 100 seashells.