Answer:
0.1469
Step-by-step explanation:
Given from the question;
Mean=8.4 hrs=μ
Standard deviation=1.8 hrs=δ
Sample size, n=40
Let x=8.7
z=(x-μ)÷(δ÷√n)
Find z(8.7)
z=(8.7-8.4)÷(1.8÷√40)
z={0.3×√40}÷1.8=1.05409
z=1.0541
Read from the standard normal probabilities table
P(z>1.0541)
=0.1459
Answer:
take 16y² common in all
Step-by-step explanation:
16y²(y²+y+3)
Answer:
The coefficient is 15120.
Step-by-step explanation:
Since, by the binomial expansion formula,
Where,
Thus, we can write,
For finding the coefficient of ,
r = 4,
So, the term that contains =
Hence, the coefficient of is 15120.
144.
Ok so he bought 9, and now has 81. All we have to do is take 9 away from 81 again and then multiply it by 2.
Answer:
C. 50
Step-by-step explanation: