Because the confidence interval ▼ ▼ the pooled sample proportion, the significance level, 0, the critical value, there ▼ does not appear to be appears to be a significant difference between the two proportions. Because the confidence interval consists ▼ of values both less than and greater than only of values greater than only of values less than ▼ the critical value, the significance level, the pooled sample proportion, 0, it appears that the first proportion is ▼ less than greater than not significantly different from the second proportion. There is ▼ sufficient insufficient evidence to support the claim that the rate of polio is less for children given the vaccine than it is for children given a placebo.

ok

step-by-step explanation:

this doesn't make sense lol

let's cover over the formula of the vertex:

y = a(x – h)^2 + k

in this formula, (h,k) are the vertex, always remember that the positive or negative value of the vertex is based on the sign it has.

for example, if the vertex is -3,-6 then both the x and y value would have the positive sign attached to it and if it were a positive x and y value, then a negative sign would be attached to it.

with that being said, for our problem the x value is a positive one so we are looking for a number with a negative sign next to it, in this case the first and second choice.

however, for the first answer choice it isn't quite part of the formula so we know that the answer choice correctly displays the x value.

to confirm, we can see if the -1 fits correctly with the second answer choice, and as mentioned above a negative number will have a positive sign attached to it. so, for our problem we can see that -1 has been changed to +1, so we can confirm that the second answer choice is correct.

hence, our final answer is y=(x - 1)^2 + 1

$5.41

step-by-step explanation:

$20 - $14.51 = $5.49.