The formula is V=1/3area of base*high
v=1/3*πr^2*h
=1/3*49π*9=49π*3=147πcm^3
a is the correct answer
Answer:
r=√( <u> </u><u> </u><u>s</u> )
4π
Step-by-step explanation:
S= 4πr^2
That is the formula for the surface area of a sphere .
first divide through by 4π and take the square root of both sides
4x^2 + 9xy - y^2 = 8
8x + 9xf'(x) + 9y - 2yf'(x) = 0
f'(x) (2y - 9x) = 8x + 9y
f'(x) = (8x + 9y)/(2y - 9x)
