Answer: 0.547
Step-by-step explanation:
As per given , we have
Population mean =
Population standard deviation=
Sample size : n= 36
We assume that number of apps used per month by smartphone owners is normally distributed.
Let be the sample mean.
Formula :
The probability that the sample mean is between 19.5 and 20.5 :-
[using standard normal distribution table for z]
Hence, the required probability = 0.547
<span>To find the area of a shaded region in a rectangle, find the total area of the rectangle and the area of the white region. then subtract the white area from the rectangular area.</span>
Answer:
5 remainder 50 and 2 remainder 100
Step-by-step explanation:
432 /73
432=400
73=70
70/400 = 005 Remainder 50
1275=1300
588=600
1300/600=2 remainder 100
Answer:
4a (n-1) + 5
Step-by-step explanation:
1th=6
2nd=29
3rd=121
4th=489
.
.
nth
if n=2
a2 = 4a(2-1) + 5 = 4 a(1) + 5 = 4 (6) + 5= 29
a3 =4a(3-1) + 5 = 4 a(2) + 5 = 4 (29) + 5= 121
try finding a4, check wether the answer is 489
Let's make the price of tickets for adults x and children y, now form an equation
Friday - 55y + 20x = 200
Saturday - 72y + 36x = 306
Now you have to have either the x or the y cancel out, so you have to find the relationship between two of them
I am going to multiply the top equation by 9/5 to cancel out the x
99y + 36x = 360
72y + 36x = 306
Now I am going to multiply the bottom equation by -1
-72y - 36x = -306
99y + 36x = 360
The x cancel out
27y = 54
y = 2
So the price of a child ticket is $2
Now plug 2 into one of the original equations
55(2) + 20x = 200
20x = 90
x = 4.5
The price of an adult ticket is $4.50