La un concurs, se acordă 10 puncte pentru o problema rezolvată corect si se scad 2 puncte pentru o problemă rezolvată greşit. Teodor a trimis la concurs 20 de probleme si a primit 176
de puncte. Cate probleme a rezolvat corect si cate a rezolvat gresit?​

2 wrongly solutions and 18 right solutions

Step-by-step explanation:

The computation is shown below:

= 20 (problems) × 10 (points)

= 200 points

And it received 176 points

So the difference is of

= 200 - 176

= 24

In the case of wrong solution, the points that are lost is

=  10 + 2

= 12

Now the solutions done wrongly is

= 24 ÷ 12

= 2

And, the solutions does rightly is

= 20 - 2

= 18

9

step-by-step explanation:

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation: