Answer:
We have 96% of confidence that the true proportion of people who responded that they have a plan to buy one electric car is between (0.121 and 0.303).
Step-by-step explanation:
For this case the estimated proportion of people who responded that they have a plan to buy one electric car is given by:
Where X represent the number of people who responded that they have a plan to buy one and n represent the sample size selected
We know that the confidence level for this case is 96% of confidence, then our significance level would be 
and 
. And the critical value would be:
The confidence interval for the true proportion is given by this expression:
Replacing the data given we got:
We have 96% of confidence that the true proportion of people who responded that they have a plan to buy one electric car is between (0.121 and 0.303).
A number, a variable, or group of number and variables that are added, subtracted, multiplied, or divided
In any rational function the denominator should never equal to 0, hence in this case since the denominator is 5n the only answer is n should not equal 0
Answer: a
Step-by-step explanation:
(6z³+3z²-4z+8) - (4z²-3z+2)
all of the numbers in the second set of parenthesis are going to have their signs switched so...
(6z³+3z²-4z+8) + (-4z²+3z-2)
now you add the two sets of parenthesis
<u>6z³ - z² - z + 6</u>
<u />
Answer:
r - 5 = 2c
r = 75
Step-by-step explanation:
To write an equation for the problem, we first need do declare the value of the number of apps cora has.
Let c = Cora's apps
r - 5 = 2c
r - 5 is used to indicate that Rita deleted 5 apps.
2c is used to represent the twice the number of apps Cora has.
Now you said that Cora had 35 apps.
Let's plug that into the equation.
r - 5 = 2c
r - 5 = 2(35)
r - 5 = 70
Now we transpose the -5 to the other side to leave r.
r = 70 + 5
r = 75
So if Cora has 35 apps, then Rita will have 75 apps.
