Meg is going to make a cake for her mother's birthday. It will take 1 hour and 15 minutes to make the cake batter, and the cake needs to bake in the oven for 1 hour and 20 minutes. If Meg wants the cake to be out of the oven by 11:00 A. M., what is the latest time she can start making the cake batter? Include A. M. or P. M. in your answer (for example, 11:58 A. M.).

8:25 A.M.

Step-by-step explanation:

First, add up all the amount of time it takes to make the cake batter and bake the cake in the oven.

It takes 1 hr and 15 mins., or 75 mins., to make the cake batter.  It takes 1 hr and 20 mins., or 80 mins., to bake the cake in the oven.

So, add 75 mins. and 80 mins. together:

It takes a total of 155 minutes to have the cake completely ready and baked.

Now, Meg wants this cake out of the oven by 11:00 A.M., so we have to find how many full hours, or rounds of 60 mins., go into 155 mins.

60 * 2=120 and 60 * 3=180.  180 is too big, so we will leave at the 2 full hours.  Subtract 2 hrs from 11am to get 9am.  

Then, subtract 120 from 155 to find out the rest of the time.  

Finally, subtract 35 mins.  from 9:00am to find out the latest time that Meg can start making the cake batter.

In an hour there are 60 mins.  So, if it is easier, subtract 35 from 60.

So, the latest time that Meg can start making the cake batter is 8:25 A.M..

10:11 A.M

11:00 A.M is 11 hours from 12 A.M (12 midnight)

11:00 A.M is 11 hours from 12 A.M (12 midnight)1 hour 29 minutes + 1 hour 15 minutes

11:00 A.M is 11 hours from 12 A.M (12 midnight)1 hour 29 minutes + 1 hour 15 minutes= 2 hours 49 minutes

11:00 A.M is 11 hours from 12 A.M (12 midnight)1 hour 29 minutes + 1 hour 15 minutes= 2 hours 49 minutes11 hours - 2 hours 49 minutes

11:00 A.M is 11 hours from 12 A.M (12 midnight)1 hour 29 minutes + 1 hour 15 minutes= 2 hours 49 minutes11 hours - 2 hours 49 minutes= 10 hours 11 minutes = 10:11 A.M

Therefore, she can start making the cake batter from 10:11 A.M.

Hope it helps you.

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step-by-step explanation:

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