After an oil spill, the ratio of contaminated water samples to clean water samples in the ocean is 7!2. Jai found 140 clean samples. How many fewer samples were clean than were contaminated?

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

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.

Divide. –40 ÷ –5 a –8 b 200 c -200 d 8