Answer:
c
Step-by-step explanation:
Step by step solution :Step 1 : 103
Simplify ———
7 <span>Equation at the end of step 1 :</span> 92 103
(0 - ——) - (0 - ———)
7 7
<span>Step 2 :</span> 92
Simplify ——
7
<span>Equation at the end of step 2 :</span> 92 -103
(0 - ——) - ————
7 7
<span>Step 3 :</span>Adding fractions which have a common denominator :
<span> 3.1 </span> Adding fractions which have a common denominator
Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:
-92 - (-103) 11
———————————— = ——
7 7
Final result :<span> 11
—— = 1.57143 </span><span>
</span>
The answer is A....a=5 b=30
The square root of 400 is 20. It's a real number, 20 x 20 = 400
√400 = 20
I hope this helps!