Wanda is going to make a cake for her mother's birthday. It will take 1 hour and 35 minutes to make the cake batter, and the cake needs to bake in the oven for 30 minutes. If Wanda wants the cake to be out of the oven by 2:05 P.M., what is the latest time she can start making the cake batter?

To determine the latest time Wanda can start making the cake batter, we need to work backwards from the time the cake needs to be out of the oven.

The cake must be out of the oven by **2:05 P.M.**, and the total time for both making the cake batter and baking the cake is:

- **1 hour and 35 minutes** to make the cake batter
- **30 minutes** to bake the cake in the oven

First, let's add the time required:

1 hour 35 minutes + 30 minutes = 2 hours 5 minutes

Now, we subtract this total time from 2:05 P.M. to find the latest time Wanda can start making the batter:

**2:05 P.M.** minus **2 hours and 5 minutes** gives us **12:00 P.M. (noon)**.

So, the latest time Wanda can start making the cake batter is **12:00 P.M.**.

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Would you like further clarification or any additional details?

Here are some related questions to explore:

1. If the baking time was increased to 45 minutes, what time should she start?
2. What if she finishes the batter faster, in only 1 hour and 20 minutes?
3. How would the timing change if the cake needed to bake for an hour?
4. What if Wanda also needs 10 minutes for cake decoration after it cools down?
5. If Wanda starts at 11:45 A.M., when will the cake be ready?

**Tip**: When working with times, it's helpful to break the problem into smaller parts, like adding or subtracting hours and minutes separately.

Learn how to calculate the latest time to start making cake batter, based on a 2:05 P.M. deadline for finishing the cake. This problem involves basic time calculations, where you subtract the total time required to make and bake the cake. Suitable for Grades 5-7 students.

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