If the temperature at the surface of the earth (0 ft) is 100°f, what is the temperature at 2000 feet if the normal lapse rate is 3.5°f/1000 feet?

The temperature on 2000 ft of depth would be 107 Fahrenheit degrees, if we follow the given rules. So if it 100 F degrees on the surface, 2 times by 3,5 on every 1000 feet is 7, so we get 100 + 7 = 107 F degrees.

May consider a group  g=({0,1},+)g=({0,1},+)where  ++  will work as the xor operator like we work in boolean algebra. note here, that ‘00’ and ‘11’ are not the usual 0 and 1 that we work with everyday. the elements are  called  ‘00’ and ‘11’ and  may not mean  zero (nothing) and one (single). ‘00’ is the identity for the given binary operator +, meaning that any element operated with ‘00’ gets us that element itself.  for a set  ss  in  g′g′  having more elements than just  {0,1}{0,1}  the values for  a+b∈sa+b∈s, such that  a∈s,b∈sa∈s,b∈s, have to be first defined, only then can you determine the value of  1+11+1. the answer could possibly have been  22  if oanswer is25,000

Iwould say the answer is d