3. Which problem situation could be solved by using the open sentence below? p-9-?
A Victor had $9.00. He spent p dollars on dinner. How much did Victor have left?
B. Tim earned $9.00 less than Kyle. Ifp is the amount that Kyle earned, how much did Tim eam?
C. Meena earns $9.00 each time she tutors. If p is the total amount of money that she earned
tutoring last week, how many times did she tutor?
D. Oscar eams a profit of $9.00 on each magazine subscription he sells. If p is the number of
magazine subscriptions that he sold, how much did he earn in all?

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