7/8 / 11/12. First get the reciprocal of 11/12 (which is 12/11). Then multiply by the reciprocal. 7/8 * 12/11 = 84/88
don't forget to simplify
21/22
To find the mean of a set, add up all of the data points and divide by the number of data points.
For the first set:
(14+18+21+15+17) ÷ 5 = 85 ÷ 5 = 17
For the second set:
(15+17+22+20+16) ÷ 5 = 90 ÷ 5 = 18
To find the MAD (mean absolute deviation) of a set, find the mean of the distances of each data point from the mean.
For the first set:
(3+1+4+2+0) ÷ 5 = 10 ÷ 5 = 2
For the second set:
(3+1+4+2+2) ÷ 5 = 12 ÷ 5 = 2.4
To find the means-to-MAD ratio of a set, divide its mean by its MAD.
For the first set:
17 ÷ 2 = 8.5
For the second set:
18 ÷ 2.4 = 7.5
The correct answer would be B
Answer:
d
Step-by-step explanation:
Answer:
-3.125m/s^2
Step-by-step explanation:
Average acceleration = v-u /t
That is initial final velocity v minus initial velocity u divided by the time t In seconds .
From the question,
v =9.5m/s
u =12m/s
t =0.8 secs
Using the above formula,
We have
average a = 9.5 -12 /0.8
= -2.5/0.8
= -3.125m/s^2
Negative answer indicates that the train was decelerating
