0,5√121+3√0,81

To simplify the expression 0,5√121 + 3√0,81, first simplify the square roots:

√121 = 11 √0,81 = 0.9

Now substitute these values back into the original expression:

0,511 + 30.9 = 5.5 + 2.7 = 8.2

Therefore, 0,5√121 + 3√0,81 simplifies to 8.2.