Students were surveyed on whether or not they enjoyed the last field trip. There where 245 students that responded no and 455 that responded yes

Can someone me with my hwplz(only the circled ones)

The height of a triangle is 4 in. greater than twice its base. the area of the triangle is no more than 168 in.^2. which inequalitycan be used to find the possible lengths, x, of the base of the triangle?

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?