21 - 16.75 is 4.25. Do the problem on a calculator and you'll get it.
Answer:
Step-by-step explanation:
The interval notation will be:
The contrary,
is 
Where you stop/finish. hope that helps :)
35. is c : square root of 64 is 8 and the square root of 8 can be simplifed to 4 x 2, square root of 4 is 2
36 is d : Denominator of the fraction represents what it is being rooted by and the numerator is what the regular number is squared by.
Answer:
Square root of 169 by Prime factorization is 13×13
