I need help with 19,20,and 21!!!I Will Mark You As BRAINLIEST!!!
1 answer:
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A number 
, where 
are distinct prime numbers, has 
divisors.
We know that
has 7 divisors. 7 is a prime number, so among the numbers 
there is only one that is equal to 7.
So,
That means
where 
is a prime number.
, therefore the 
has 
divisors.
We know that
So,
That means
Solution:
Let number of upgrade options = p
Let total number of distinct variations in which 256 new homes is available = k
So, p × p× p.....k times = 256
⇒
256= 2 × 2 ×2 ×2 ×2 ×2 ×2 ×2=
256= 4 ×4 ×4 × 4=
So,Either, number of upgrade options = 2 ,
Or , Number of upgrade options = 4