Answer:
The average speed of the trip there is <u>86 mph.</u>
Step-by-step explanation:
Given:
Time taken to reach Portland = 3 hours
Time taken to come beck from Portland = 6 hours
Average speed for the returning trip = 43 mph
Distance traveled for the returning trip can be obtained by multiplying the returning speed by returning time. Therefore, distance for returning trip is:
Now, distance traveled for the return trip is same as going to the trip.
So, distance traveled by Jessica going to Portland = 258 miles.
Time taken to go there = 3 hours
Therefore, speed of the trip there is given as the ratio of distance and time and is given as:
Therefore, the average speed of Jessica's car to go to Portland is 86 mph.
Answer: (2,8)
Step-by-step explanation:
Count the number of boxes down from the x axis and then count the same number up to get the position of A
Answer:
$ 8.10
Step-by-step explanation:
8% from $ 7.50 is $ 0.60
$ 7.50 x 8/100 = $ 0.60
$ 7.50 + $ 0.60 = $ 8.10
Answer:
No, this result is not surprising. It is a little bit more than one standard deviation above 20%
Step-by-step explanation:
Proportion of each color in the population (p) = 0.20
Sample size (n) = 20 Skittles
The standard deviation of a sampling distribution is determined by:
The difference between the observed proportion of 0.30, and the mean proportion of 0.20 is 0.10, which is just a little bit more than one standard deviation of 0.089. Therefore, this result is not surprising since it is a little bit more than one standard deviation above 20%.
Rule to find
-th element of arithmetic sequence:
So for
: