Answer:
f(r) = 2πr
Step-by-step explanation:
You know the formula for circumference in terms of radius is ...
C = 2πr
You are being asked to write this as a function named "f". That will be ...
f(r) = 2πr
Interest=1250-880=370
I=PRT
P=principal
r=rate in deicmal
t=time in years
1 month so t=1/12
P=880
I=370
370=880*r*1/12
370=220/3r
times both sides by 3
1110=220r
divdie both sides by 220
5.04545=r
505% interest
B and C since in these cases money is leaving your account.
add the 2 numbers and then divide by 2
Answer:
CD= 34
Step-by-step explanation:
As CD is the diameter the circle divides to half and point E is on the circle ∴∠CED =90° (angle of a semi circle)
as CD is the diameter it would be the lengthiest of all ∴ CD is hypotenuse
so 
= CD=
=CD=
∴CD=34