Answer:
Test statistic = - 3.354
We reject H0 and conclude that the growth rate of the new shrub is less than 3cm per week.
Step-by-step explanation:
H0 : μ = 3
H1 : μ < 3
The test statistic = (xbar - μ) / (s/ √n)
Xbar = 1.50
μ = 3
s = 3
n = 45
Test statistic = (1.5 - 3) / (3/ √45)
Test statistic = - 1.5 / 0.4472135
Test statistic = - 3.354
Pvalue, using the Pvalue from Z score calculator :
Pvalue = 0.00039826
α = 0.05
Pvalue < α ; We reject H0 and conclude that the growth rate of the new shrub is less than 3cm per week.
Remember the divisibility rule for 9. The sum of the digits of the number must be divisible by nine.
Let the digit be

. Then

has to be divisible by nine. Recalling that

, we note that

.
If you put in z to the equation

you get

and that equals 9 so the answer is B. 9
It would be 1 1/5. When you divide a fraction you would take the second fraction and flip it and then multiply the two