Answer:
22 is C and I don't know 21
The surface area of a prism is the total sum of the areas of all sides of the prism.
Well, there's many equations that represent real world situations. These equations we use a lot in engineering. For example, something fundamental is that we can calculate the velocity of something by knowing it's acceleration by taking the integral of the acceleration.
Answer:
I believe the second step would be evaluating the exponent so you just do 7×7 boom i hope i helped