Choose the operation. Scientists believe that Niagara Falls was formed 10,000 years ago, and they predict it will
last for another 25,000 years. How old will Niagara Falls be then?

Niagara Falls will have 35,000 years of formation then

Step-by-step explanation:

1. Let's review the information given to us to answer the question correctly:

Niagara Falls was formed 10,000 years ago

Scientists predict it will  last for another 25,000 years

2. How old will Niagara Falls be then?

10,000 + 25,000

35,000

Niagara Falls will have 35,000 years of formation then

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