Algebra 2 problem

[frank777]

Much appreciation for any help. Problem:

1. Calculate the time duration of the roller coaster ride using t=d/r
answer should be in seconds

Speed of roller coaster is 128 mph, length of roller coaster is 3,118 ft.

2. Calculate the average acceleration for the roller coaster using a=(2s)/(t squared), s = distance in meters and t = time in seconds

 

[tkhunny]

Much appreciation for any help. Problem:

1. Calculate the time duration of the roller coaster ride using t=d/r
answer should be in seconds

Speed of roller coaster is 128 mph, length of roller coaster is 3,118 ft.

You have this:

r = 128 mph
d = 3118 ft

You'll need this:

1 mile = 5280 ft
1 hr = 60 min
1 min = 60 sec

Let's see what you get.

 

[frank777]

I'm homeschooled due to physical disability. I think I may need a refresher course in Algebra 1 because I'm just not getting this. In the meantime I need to understand this in order study for an exam. Any chance you can explain in more detail the steps I need to take so I can understand? Much appreciated!!!!

 

[fasteddie65]

Much appreciation for any help. Problem:

1. Calculate the time duration of the roller coaster ride using t=d/r
answer should be in seconds

Speed of roller coaster is 128 mph, length of roller coaster is 3,118 ft.

t = d/r = 3118 ft/128 mph = 3118 ft • 1 mi/5280 ft/128 mph = 0.59053... mi/128 mph = 0.00461... hr • 10 min/1 hr = 0.2768... min • 60 sec/1 min = 16.608... sec

2. Calculate the average acceleration for the roller coaster using a=(2s)/(t squared), s = distance in meters and t = time in seconds

a = 2s/t^2 = 3118 ft/(16.608... sec)^2 = 11.303... ft/sec^2

I do not believe the question really wants you to convert from ft to meters.