Layla is driving to a concert and needs to pay for parking. There is an automatic fee of $8 just to enter the parking lot, and when she leaves the lot, she will have to pay an
additional $3 for every hour she had her car in the lot. How much total money would
Layla have to pay for parking if she left her car in the lot for 6 hours? How much
would Layla have to pay if she left her car in the lot for t hours?

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.

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

Two airplanes start at the same place and travel in opposite directions, one at 395 miles per hour and the other at 422 miles per hour. how many hours will it take for the planes to be 2451 miles apart?