7/15 is the simplified fraction for 42/90
let's put value of t in equation.
x = 2√t
x = 2√y
x/2 = √y
(x/2)^2 = y
y = x^2 /4
now let's differentiate it with respect to x.
dy/dx = 2x/4 = x/2
differentiating again wrt to x
d^2y/dx^2 = 1/2
Answer:
90
Step-by-step explanation:
Basically 90 precent of 100 is 90
C is 6 because the absolute value of -19 -13 would be 19-13 which equals 6
