Which statements describe elements?

A. Elements can be separated using physical means.
B. Elements are made of atoms with the same atomic number.
C. Elements cannot be separated using ordinary chemical means.
D. Elements may be represented by chemical symbols.
E. Elements are made of two or more different types of atoms.

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

518,400

step-by-step explanation:

the area is multiplying all the given measurements together.

40 * 18 * 30 * 24 = 518,400

0.02040816326