Answer:
61 inches
Explanation:
She can be 60 inches to ride the roller coaster because it says greater than or equal to, but she would not be able to ride the ferris wheel because it says that she must be taller than 60 inches.
If shes, 61 inches, then she can ride both rides. and that would be the shortest height Makayla can be and still ride both rides.
Hope this helps