The volumes of two similar solids are 210 m3 and 1,680 m3. the surface area of the larger solid is 856 m2.
what is the surface area of the smaller solid?

         The surface area of smaller solid is:

                                  214 m²

Let A,V be the surface area and the volume of larger solid.

and A',V' be the surface area and volume of other solid.

We know that the ratio of volume to the surface area of the solid is given by:

On taking power 6 on both side we obtain:

We have:

V=210 m³ ,  V'=1680 m³

A=856 m²

Hence, we have:

Hence, the surface area of solid is:

                       214 m²

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this

step-by-step explanation:

to find if any function is an inverse of the other, put the first equation in as x in the next one. then simplify and solve. if at the end you get the statement y = x, then it is an inverse. if you get anything else, it is not.