Jeff ordered 5 pizzas for his daughters birthday party. Each pizza has 8 slices. At the party, 50%
of the pizzas were eaten. When the party was
over, Jeff ate 20% of what was left. How many
did Jeff eat?

4 slices.

Step-by-step explanation:

5 x 8 = 40. 40 slices of pizza divded by 2 since 50% = 2.

20 slices, 20% of 20 slices or 20 in general is 4

Therefore, the survey's margin of error is ±3%

Step-by-step explanation:

From a survey, a reporter determined that true estimate for the proportion of citizens who plan to sign a petition is between 68% and 74%.

given estimate range = 68% to 74%

Margin of error = (74% - 68%) ÷ 2

6 ÷ 2 = 3%

Therefore, the survey's margin of error is ±3%