Answer:
6
Step-by-step explanation:
Y is directly proportional to 1/x2
Y = k/x2
Where k is the proportionality constant
y1*(x1)2 = y2*(x2)2
7.2*(10)2 = 20*(x2)2
x2 = sqrt(36)
X = 6
Answer:
450
Step-by-step explanation:
B is 50 and A is all of them?
The answer is 4
1 sf means only one number other the zero
So 4.31 means only one number other than zero, so, 4.31. '3' rounds down as does '1'. So the answer is 4.00
