a = 56
given 28 =
a
multiply both sides by 2 to eliminate the fraction
56 = a
As a check
× 56 = 28 ← True
Answer:
Area of larger circle = 
Area of smaller circle = 
Probability that it lands in the shaded area (smaller circle):
28.26 ÷ 379.94 = 0.07438... = 0.07 (nearest hundredth)
Answer:
One answer would be -2.155.
Since 3 squared is 9 and 4 squared is 16, the square root of 13 will fall somewhere between 3 and 4