Answer: Mean = 52.8 mins
Step-by-step explanation:
We have lapses of 30 minutes, so we can write the average for each, this means that:
0 < t < 30 can be averaged to the middle of the range: 15 min.
Doing this, we have that:
7 students 15 min
27 students 45 min
12 students 75 min
4 students 105 min.
Now we can calculate the mean:
mean = (x1*n1 + x2*n2 + ...)/N
where x1 is the amount of time 1, and n1 is the number of students associated to that time and so on. N is the total number of students
Mean = (7*15min + 27*45min + 12*75min + 4*105min)/(7 + 27 + 12 + 4)
Mean = 52.8 mins
It is negative.
When you subtract a negative a positive number from a negative number, the result is positive. The equation can be rewritten as -8.8-(+3.4).
Answer:
67 mph
Step-by-step explanation:
A method you'd want to remember is r = d/t, or rate equals distance divided by time.
Since the Morris family drove 368.5 miles in 5.5 hours, you'd divide the distance by 5.5.
(368.5/5.5) = 67 miles per hour.
So their average rate is 67 miles per hour.
Hope this helps.
(2.3*10^-3) / (4.6*10^-7)
(2.3*0.001) / (4.6*0.0000001) *10^-3=0.001 & 10^-7=0.0000001*
(0.0023) / (0.00000046) *2.3*0.001=0.0023 & 4.6*0.0000001=0.00000046*
5000 *0.0023/0.00000046*
So the answer is 5000
Answer:
3. increasing
4. decreasing
Step-by-step explanation:
well for graph 3 the values are increasing
and for graph 4 the values are decreasing
