Answer:
(0.6430, 0.8170)
Step-by-step explanation:
Given that during a recent drought a water utility in a certain town sampled 100 residential water bills and found out that 73 of the residences had reduced their water consumption over that of the previous year.
Sample size n = 100
Sample proportion p =
q = 1-p = 0.23
Std error of proportion =
95% Z critical value = 1.96
Margin of error =
Confidence interval = sample proportion ±margin of error
0.642983946
0.817016054
(0.6430, 0.8170)
Answer:
<em>Kaya found 25 shells on the beach yesterday.Today she found 25 more shell. She sorted all the shells into 5 pile.Which equation can be used to find how many shells are in each pile? </em>
<em>A.s=(25+25)÷5 </em>
<em>B.s=25÷5 </em>
<em>C.s=(25+25)-5</em>
Equation A can be used to find the number of shells in each piles.
Step-by-step explanation:
Given:
Number of shells Kaya found day before =
Number of shells she found today =
According to the question:
She sorted it into piles meaning we have to equally put them in each pile, for this we have to divide the total number of shells.
Let the number of shells in each pile =
And total number of shells =
So,
The number of shells in each pile.
⇒
⇒
⇒
From equation where,
gives the same answer.
Then option A is the right choice.
