Rob is saving to buy a new mp3 player. for every $15 he earns babysitting, he saves six dollars. on saturday, rob earned $75 babysitting. how much money did you save?

What is the radical expression that is equivalent to the expression 27 1 over 5?

In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.

How can you check that you have correctly converted frequencies to relative frequencies?