Can someone help me? . Which of the following expressions represent 15% tip on a $20 meal? Which represents the total bill? Select all that apply. Explain your reasoning for the choices you select. [4 points]
A. 15 * 20
B. 20 + 0.15 * 20
C. 1.15 * 20
D. 15/100 * 20

Apsychology student wishes to investigate differences in political opinions between business majors and political science majors at her college. she randomly selects 100 students from the 260 business majors and 100 students from the 180 political science majors. does this sampling plan result in a simple random sample? why or why not? no, because each group of 200 students in the sample does not have the same chance of being selected. yes, because each group of 200 students in the sample has the same chance of being selected. no, because each individual student does not have an equal chance of being selected. yes, because each individual student has the same chance of being selected.

Aschool allots ? 1500 to spend on a trip to the theatre. theatre tickets have a regular cost of ? 55 each and are on offer for 1 5 off. a train ticket for the day will cost ? 12 each. if 2 teachers and the maximum number of students attend, how much money will the school have left over?

Tan198=asin164=? how to solve this? ?