4^61+4^64+4*65 is divisible by

4⁶¹ + 4⁶⁴ + 4⁶⁵ = 4⁶¹ (1 + 4³ + 4⁴)

... = 4⁶¹ (1 + 64 + 256)

... = 4⁶¹ • 321

... = 4⁶¹ • 3 • 107

So it's divisible by 4, 3, and 107, in addition to any combination of these divisors.

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk