- #1
bergausstein
- 191
- 0
1. Average Speed. Junior drove his rig on Interstate 10 from San
Antonio to El Paso. At the halfway point he noticed that he had
been averaging 80 mph, while his company requires his average
speed to be 60 mph. What must be his speed for the last half of
the trip so that he will average 60 mph for the entire trip?
my solution
(80+r)/2 = 60
r = 40 mph
but my book says it is 48 mph. can you tell me where's my mistake?2. Grade point average (GPA). A college student has finished
48 credit hours with a GPA of 2.75. To get into the program
she wishes to enter, she must have a GPA of 3.2. How
many additional credit hours of 4.0 work will raise her
GPA to 3.2?
I don't know what 4.0 mean here. regards!
Antonio to El Paso. At the halfway point he noticed that he had
been averaging 80 mph, while his company requires his average
speed to be 60 mph. What must be his speed for the last half of
the trip so that he will average 60 mph for the entire trip?
my solution
(80+r)/2 = 60
r = 40 mph
but my book says it is 48 mph. can you tell me where's my mistake?2. Grade point average (GPA). A college student has finished
48 credit hours with a GPA of 2.75. To get into the program
she wishes to enter, she must have a GPA of 3.2. How
many additional credit hours of 4.0 work will raise her
GPA to 3.2?
I don't know what 4.0 mean here. regards!