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Step 1: Calculate the Time to Eat One Whole PizzaDonna eats a quarter of a pizza in one minute. So, to find out how long it takes her to eat an entire pizza, we can do some simple math:

Time for one pizza = 4 × 1 minute = 4 minutes

Step 2: Calculate the Time to Eat 2.5 PizzasNow that we’ve established Donna takes 4 minutes to eat one pizza, we can calculate the total time for 2.5 pizzas by multiplying the time for one pizza by 2.5:

Total time = 2.5 × 4 minutes = 10 minutes

ConclusionTherefore, it will take Donna 10 minutes to eat 2.5 pizzas.