Charmaine drove to the mountains last weekend. there was heavy traffic on the way there, and the trip took 9 hours. when charmaine drove home, there was no traffic and the trip only took 4 hours. if her average rate was 40 miles per hour faster on the trip home, how far away does charmaine live from the mountains?

triangle and cube

step-by-step explanation:

hi there!

first we need to find out how much they are adding to each number to make the next number.

ex: 4 + 4 = 8, 8 + 8 = 16, and so on.

so continuing with 32,

32 + 32 = 64

64 + 64 = 128

128 + 128 = 256

256 + 256 = 512

4, 8, 16, 32, 64, 128, 256, 512

the 8th term of the sequence will be 512

hope this ! ~