please help with physics?

Question

The following equation is for the next question.
t½ = τ ln2 = RC ln2

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2. Given a resistance of 101 Ohms and a capacitance of 190micro Farads,
what is t½?
t½ = ______________seconds.
(Hint: There are 106 micro Farads in one Farad. So the capacitance is 0.00019 Farads.
(Answer with three significant figures (in seconds) or N/A if there is no answer.)

Answer 1

No, 190 uF= 190 e-6 Farads

The voltage across a capacitor is given as

V(t)=V(max) exp(-t/RC)
one time constant = RC= 101x190 E-6=19.2 msec

If you insist

t½ = τ ln2 = RC ln2 = 19.2 x ln(2)= 0.0133