George walks 1 mile to school. he leaves home at the same time each day, walks at a steady speed of 3 miles per hour, and arrives just as school begins. today he was distracted by the pleasant weather and walked the first 12 mile at a speed of only 2 miles per hour. at how many miles per hour must george run the last 12 mile in order to arrive just as school begins today?

Answer this 30 points and brainliest!

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Michelle and julie work at a catering company. they need to bake 264 cookies for a birthday party that starts in a little over an hour and a half. each tube of cookie dough claims to make 36 cookies, but michelle eats about 1/5 of every tube and julie makes cookies that are 1.5 times as large as the recommended cookie size. it takes about 8 minutes to bake a container of cookies, but since julie's cookies are larger, they take 12 minutes to bake. a. how many tubes should each girl plan to bake? how long does each girl use the oven? b. explain your solution process what did you make? c. what assumptions did you make?