Find the area of the shaded figure

Express result to the accuracy of 2 decimal.
Category: 
Correct Answers: 
13
Points: 
1

Calculate the number 594

NUMBERMANIA: Calculate the number 594 using numbers [7, 1, 4, 9, 34, 554] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Category: 
Correct Answers: 
1
Points: 
10

Calculate the number 6341

NUMBERMANIA: Calculate the number 6341 using numbers [1, 9, 3, 8, 79, 607] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Category: 
Correct Answers: 
0
Points: 
10

What a winning combination?

The computer chose a secret code (sequence of 4 digits from 1 to 6). Your goal is to find that code. Black circles indicate the number of hits on the right spot. White circles indicate the number of hits on the wrong spot.
Category: 
Correct Answers: 
1
Points: 
10

Calculate the number 6650

NUMBERMANIA: Calculate the number 6650 using numbers [7, 7, 4, 3, 21, 922] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.
Category: 
Correct Answers: 
4
Points: 
7
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