Can someone please help me with 10 and 12! this is due tomorrow and i need it done soon! thank you in advance! (the x axis is time in days for 12)

Astudent simplified a rational expression as shown.

What is the ratio for the surface areas of the cones shown below, given that they are similar and that the ratio of their radii and altitudes is 2: 1? submit

In the diagram, a building cast a 35-ft shadow and a flagpole casts an 8-ft shadow. if the the flagpole is 18 ft tall, how tall is the building? round the the nearest tenth.