Samantha and luis are attempting to determine how many library books each seventh grade student checks out at the same time. samantha surveys every other seventh grade student leaving the library. she samples a total of 40 of the 200 seventh graders. luis samples 30 of the 200 seventh grade students at random in the school cafeteria. whose sample is the  mostrandom? luis because his sample is taken from the population of all seventh gradersluis because he samples fewer studentssamantha because she samples more studentssamantha because her sample is taken from the population of students who use the library

3.4 pizzas

step-by-step explanation:

given is a scatter plot showing number of pizzas sold during weeks for different issues of coupon

y represents number of pizzas sold and x number of coupons issued

y is marked verticaly and x horizontally

the trend line is given as

y =3.4x+43

this says that even when no coupon is issued pizzas sold will be 43

and rate of change of pizza sold for 1 unit of coupon = slope = 3.4

i.e. when x increases by 1 unit y increases by 3.4 units

hence for each additional coupon issued 3.4 pizzas more will be sold

amount of oatypop that contains the prize = 40%

amount   of oatypop which doesn't contain the prize = (100-40)=60%

probability that hannah will win a prize

    = s +f s +f f s+ff   f s+ff f f s+ infinity.where f= failure,s= success

=   or 60%

probability that hannah only has to buy 3 or less boxes before getting a prize= (s) and ( f s) and (ff s) and (f f f s)

        = = 87.04 %  

step-by-step explanation: