Agroup of 20 students includes 5 students in sixth grade, 8 students in seventh grade, and 7 students in eighth grade. each student's name and grade are written on an index card and placed in a bag. a card is randomly selected from the bag. what is the probability that a seventh grader's name will be selected, p(seventh grader) p(seventh grader) ?

9. (y^-5)^10y^10 a. y^-60 b. y^60 c. y^-150 d. y^150 find the simplified form of each expression. 10. (4/7^5)^2 a.8/14^10 b.16/49^25 c.16/49y^10 d.8/14y^25 11. determine if the number 3.43 times 10^-6 is written in scientific notation. if not, explain. a. yes; the number is written scientific notation. b. no; the first factor is not a number between 1 and 10. c. no; it is not written as a number times a power of 10

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21

The final cost of a sale is determined by multiplying the price on the tag by 75%. which best describes the function that represents the situation?