A study with a sample that is very different from the population is A) an experiment
B) unbiased
C) an observational study
D) biased

The long jump record, in feet, at a particular school can be modeled by f(x) = 19.6 + 2.5ln(x + 1) where x is the number of years since records began to be kept at the school. what is the record for the long jump 11 years after record started being kept? round your answer to the nearest tenth.

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

If your teacher tells you to do questions 6 through 19 in your math book for homework, how many questions is that