Researchers wanted to compare the time taken to complete a task using the non-dominant hand for right-handed people and left-handed people. One group of 72 right-handed people took an average of 25 seconds to write a provided short sentence using their left hand. Another group of 62 left-handed people took an average of 19 seconds to write the same sentence using their right hand. Assume that the population standard deviations of times taken to write the sentence are 1.8 seconds for the righties and 1.5 seconds for the lefties. Find the 95% confidence interval for the difference in population mean time to write the sentence between righties and lefties. Let the right-handed people be the first sample, and let the left-handed people be the second sample. Assume the samples are random and independent. Assume that both the population distributions are normally distributed. Round your answer to two decimal places.

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

answer: 80,000

step-by-step explanation:

the population doubles every day.

10,000*2=20,000 day 4

20,000*2=40,000 day 5

40,000*2=80,000 day 6

false

step-by-step explanation:

false : it can not go to 9 the highest that part can go is 7

here is your proof