Find the length of each object to the nearest centimeter
and millimeter.

6.Width of a book

7. Length of a pencil
PLS HELP HURRY I WILL MARK BRAINLESS IF THE ANSWER IS GOOD!

Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining bismuth-210 transforms into another atom (polonium-210 in this case) each day. if you begin with 233 mg of bismuth-210, how much remains after 8 days?

Three times the sum of a number and seven is negative thirty-six. what is the number?

Asquare has a side that measures 11 units. what is the area of a circle with a circumference that equals the perimeter of the square? use 3.14 for π, and round your answer to the nearest hundredth. 1519.76 units2 379.94 units2 616.56 units2 154.14 units2