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
Answer:
I am not sure
Step-by-step explanation:
Answer:
Step-by-step explanation:
The sides are consecutive integers and the perimeter is 12 ft.
3 ft, 4 ft, 5 ft
One angle is 90°, one angle is arcsin(3/5) ≅ 36.9°
the remaining angle is 90-36.9 = 53.1°
If it is a 10 by 10 then it would be 100. if it was a 5 by 15 it would be 75
When solving these types of problems just ignore the “shorter leg” or “longer leg” and focus on the lengths. Pythagorean’s Theorem is used in this problem. Since a leg and hypotenuse length are given then you you set the problem up as 9^2+b^2=15^2. You then do the squares so that it is shown as this, 81+b^2=225. Next you need to subtract 81 on both sides of the equation to isolate the variable b (or the missing leg length) which leaves you with b^2=144. Next to isolate the variable completely you do the square root of both b^2 and 144 which leaves you with the answer b=12. The leg is 12cm long.