In a survey, 250 adults and children were asked whether they know how to
swim. the survey data are shown in the relative frequency table.
what percentage of the people surveyed are adults?

The answer is 40%

Step-by-step explanation:

You first multiply the amount of people surveyed by the decimals shown...250×0.34=85 250×0.06=15 Add them together 85+15=100

Next you divide your answer(100) by 250 which will give you 0.4

Finally, multiply 0.4 by 100 to make it a percent

Your final answer will be 40.

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet