Adding & subtracting in scientific notation Express your answer in scientific notation.
1.8. 10-2 – 3.9. 10-3

Afarmer sells 9.5 kilograms of apples and pears at the farmer's market. 4/5 of the weight is the apples and the rest is the pears. how many kilograms of pears did she sell at the farmers market

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.

Ron has 8 caps and 4 of his caps are blue. thes rest of his cap are red. how many of ron's caps are red