Answer:
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: [tex]75+80=155[/tex]
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.
[tex]155-120=35[/tex]
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.
[tex]60-35=25[/tex]
So, the latest time that Meg can start making the cake batter is 8:25 A.M..
