Determine whether the situation calls for a survey, an observational study, or an experiment.

you want to find out if a new reading program can increase reading comprehension.

a. experiment

b. observational study

c. survey

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

Aclothing store has the sign shown in the shop window. pani sees the sign and wants to buy 3 shirts and 2 pairs of jeans. the cost of each shirt before the discount is $12, and the cost of each pair of jeans is $19 before the discount. write and simplify an expression to find the amount pani pays if a $3 discount is applied to her total

Laura read 1/8 of a comic book in 2 days. she reads the same number of pages every day. what part of the book does she read in a week