Brandon is treating his parents to dinner at Pizazz Pizza. The total cost of the meal includes a 15% tip and 8% tax. If the cost of the meal before the tip and tax are added is represented by P, which expression models the total amount that Brandon pays?
A) P + 0.15P + 0.08P
B) P(0.15P − 0.08P)
C) P −(0.15P + 0.08P)
D) P + 0.23

The price (P) of a model car kit is $15. If the sales tax on the purchase is 9%, which expression models the cost of the kit including the tax?
A) 0.91P
B) 1.09P
C) 1.15P
D) 15.09P

HEL PLEAS

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