The answer is 50% hope this helps
Given 
To write in logarithmic form we convert exponential form to logarithmic form
We apply the following rule
can be written as 
here b = 6 , x=4 and a = 1296
can be written as 
option A is correct
Take it apart mentally cylinder+2hemispheres 2hemispheres=2half spheres=1 sphere 15=radius of sphere+legnth of cylinder+radius of spehre diameter=5 d/2=5/2=r 15=2.5+legnth+2.5 10=legnth of cylinder surface area of sphere=4pir^2 surface area of cylinder (not including bases) is pidh sphere radius=2.5 SA=4pi2.5^2 SA=4pi6.25 SA=25pi SA=78.5 sphere area SA=5pi10 SA=50pi SA=157 add them 78.5+157=235.5 mm^2
Answer:
Prove whether the following are identities 2tanh 1/2x / 1−tanh^2 1/2 x = sinh x
