Final answer:
The approximate diameter of Kayla's bicycle wheel is approximately 38 inches.
Step-by-step explanation:
The circumference of a circle is calculated using the formula C = 2πr, where C is the circumference and r is the radius of the circle.
In this case, the circumference of Kayla's bicycle wheel is given as 19 inches.
We can use the formula to find the radius:
C = 2πr
19 = 2πr
To find the approximate diameter, we can multiply the radius by 2:
D = 2r
So, the approximate diameter of Kayla's bicycle wheel is 2 times the radius, which is approximately 38 inches.