Suppose f(z) = u(x, y) + iv(x, y) is analytic in some domain
inthe complex plane. show that the families of level curves u(x, y)
=c1 and v(x, y) = c2 are orthogonal. more precisely, at any point
z0of intersection of two leve curves u(x, y) = c1 and v(x, y) = c2
thetangent lines to the two curves are perpendicular, provided f
'(z0)not equal to 0.

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

pls mark as brainliest

we need to divide the number of toy dinosaurs, 156, by the number of brothers, 4:

in order to estimate, we can use compatible numbers:

156 ÷ 4

  ↓

160   ÷ 4 = 40        

the correct answer is a).