8; 20/5=4, 4*2=8 so therefore it's 8 pounds
Answer:b
Step-by-step explanation:
Time taken for the amount deposited to grow to $5000 will be found as follows:
A=P(1+r/100*n)^nt
where:
A=amount
P=principle
r=rate
n=number of terms
t=time
thus plugging in our values we have:
5000=3587.39=(1+4.2/200)^2t
solving for t we have:
1.393771=1.021^2t
2t=ln1.393771/ln1.021
2t=16.111
t=8.055685 years~8 years
70.24, That should be right
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Given the population mean is 
and population standard deviation is 
.
Now sample mean is 
and standard deviation of the sample mean is 
.
Use Z-score for finding the probabilities. Use a standard normal distribution table.
a)The probability
b)The probability
c)The probability
