25) Circumference of a circle equals [tex] \pi [/tex] times diameter. The diameter (5.3) is already provided so just multiply it by pi.
Final answer: 5.3[tex] \pi [/tex]
26) So close! Multiply 40 by 2, because 40 is only the length of the radius. You should get 80, then multiply that by pi. This follows the same formula as the question above.
Final answer: 80[tex] \pi [/tex]
