Answer:
a) P value = 0.0013
b) No, it is not plausible that the silicon content of the water is no greater than it was 10 years ago
Step-by-step explanation:
The null hypothesis here is “Mean is equal to 5” while alternate hypothesis is that “Mean is greater than 5”
Given
Mean = 5, x’ = 5.4 and sigma = 1.2 and n = 85
Z = x-u’/sigma/sqrt n
Substituting the given values, we get –
Z = 3.02
A) P value = 0.0013 which is less than 0.05 and thus we will reject the null hypothesis
B) There is enough evidence to reject the null hypothesis
Answer:
A
Step-by-step explanation:
From the first inequality,we got:
11x+4<15
11x<11
x<1
From the second inequality,we got:
12x>-18
x>-3/2
Combine it together we got
-3/2<x<1
Answer:
Michelle's age = 16
Step-by-step explanation:
As we know,
Amount = 
where
P = Principal amount
r = rate of interest
t = time
Given ,
P = $1000
r = 4.5 % = 
Now,
Given that Amount reaches more than $2000
⇒ > 2000
⇒
> 2000
⇒
> 2
Now,
we put the value of t from 0 , 1, 2, ..... untill the above equation does not satisfy
Now,
for t = 0
for t = 1
for t = 2
for t = 3
for t = 4
for t = 5
for t = 6
for t = 7
for t = 8
for t = 9
for t = 10
for t = 11
for t = 12
for t = 13
for t = 14
for t = 15
for t = 16
It satisfies at t= 16
∴ we get
Michelle's age = 16
Answer:
1 is the degree of 7x because according to alzebra if the variable have nothing power then that has power 1
