Answer:
x = 10
Step-by-step explanation:
SA=4pir^2
r=20m
SA=4pi20^2
SA=4pi400
SA=1600pi m^2
Answer:
$24
Step-by-step explanation:
What you do is you just times 84 x 2/7 to get your answer.
84 x 2/7=$24 is your answer.
Wa=0.5Wb, Ha=20, Hb is unkown
the area of rectangle a is : Wa*20
the area of rectangle b is : Wb*Hb
Rectangle a has 7 times the area of rectangle b: Wa*20=7*Wb*Hb
Replace Wa with 0.5Wb: 0.5Wb*20=7Wb*Hb => Hb=10/7
Answer:
162
Step-by-step explanation:
The number with "1" digit starts with 101 then 110 and so on.