Hello im on a timer and have no clue what im doing half the time

Cone a has a surface area of 384 ft2 and cone b has a surface area of 96 ft? . what is the ratio of their volume?

What is 100,000 times 1/100,000, using the standard method of multiplication? write the answer as 10 to a power.

Urgent? will give brainliest given that the blue triangle is a right triangle, which expression correctly gives the area of the red square? a) a2 + b2 b) a2 - b2 c) a2 - c2 d) c2 - a2