Consider a circle with a diameter of 10cm what is the circumference of the circle. what is the ratio of the circumference to the diameter

Circumference formula: A = π * diameter

3.14×10=31.4

31.4:10

or 3.14 to 1

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

the answer is d

step-by-step explanation: