d=2r, r = 2.5
A= πr2
Area = 3.14 ⋅ 2.5 ⋅ 2 = 15.7 
It's the third one. i guessed on the test and got the answer right
Answer:
1. x = 24
2. r = -7
3. x = - 110
4. x = 10/3
Step-by-step explanation:
1. x/6 = 4 => x = 6 · 4 = 24
2. r/7 = -1 => r = -1 · 7 = -7
3. -x/11 = 10 => -x = 11 · 10 = 110 => -x = 110 / ·(-1)
Now we will multiply the both sides with (-1) and get
x = -110
4. x/4 = 5/6 It's the same as proportion x : 4 = 5 : 6
Now we will multiply external and internal members and get
6 x = 4 · 5 => 6 x = 20 => x = 20/6
Now we reduce the numerator and the fractional denominator with the number two and get
x = 10/3
God with you!!!