What is the value of h?
h = 20
h = 35
oh= 55
h = 70
(2h)
(2h)

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

4

step-by-step explanation:

im pretty sure it's 4 beacsue 8/2 equals 4

the image is given below

since the options are not given so we draw it from the equation

the given equation is

y = (x-1) (x+4)

y = y² + 3x - 4

the above equation is a quadratic equation which will have two roots. if we draw the graph for it, it will look like this