Arecent poll of 80 randomly selected californians showed that 38% ( = 0.38) believe they are doing all that they can to conserve water. the state government would like to know, within a 99% confidence level, the margin of error for this poll. (99% confidence level z*-score of 2.58) remember, the margin of error, e, can be determined using the formula e = z*. to the nearest whole percent, the margin of error for the poll is %.

14%

Step-by-step explanation:

Given:  Sample size

sample proportion

Confidence level

We know that Margin error

Thus, to the nearest whole percent, the margin of error for the poll is 14%

30

step-by-step explanation:

idk

i hope i

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15