(PLEASE ANSWER SHOW WORK THANK YOU! 2 QUESTIONS ANSWER ANYONE OF THEM OR BOTH) What is the length of a vertical line segment joining ordered pairs (4,3) and (4,12)? Answer choices:

A. 7 units
B. 9 units
C. 15 units
D. 16 units

2nd question;
Mary wants to find the horizontal distance between coordinate points (9,4) and (3,4) what can be so to find that distance?

A. Add the x-coordinates
B. Add the y-coordinates
C. Subtract the x-coordinates
D. Subtract the y-coordinates

Acell phone company offers two plans to its subscribers. at the time new subscribers sign up, they are asked to provide some demographic information. the mean yearly income for a sample of 40 subscribers to plan a is $45,000 with a standard deviation of $9,200. for a sample of 25 subscribers to plan b, the mean income is $64,300 with a standard deviation of $7,100. at the 0.025 significance level, is it reasonable to conclude the mean income of those selecting plan b is larger? assume unequal population standard deviations. hint: for the calculations, assume the plan a as the first sample. what is the decision rule? (negative amount should be indicated by a minus sign. round your answer to 3 decimal places.) compute the value of the test statistic. (negative amount should be indicated by a minus sign. round your answer to 2 decimal places.) what is your decision regarding h0 ? reject h0 fail to reject h0 compute the p-value. less than 0.01 between 0.01 and 0.025 between 0.025 and 0.05 between 0.05 and 0.10 greater than 0.10