Answer:
15pi/60 = pi/4 hopefully this helps :)
Step-by-step explanation:
Angle in radians = arc / radius
15pi/60 = pi/4
Assuming you are asking how many weeks, than the answer would be 17-32, because at 16 weeks the growth would be 4 cm, totaling at 11, but you need more than 11cm, and at 32 weeks it's at 15 cm.
It is 45... Because you add all the numbers together then divide it by the number of numbers their are
