Integration

the current i, in amps, that flows in a circuit is given by,
i= 4(1+e -0.1t) square root
find the total charge q that has flowed through the circuit between times t=1s and t=2s
NB: the charge q coulumbs flowing through a circuit is given by q= ∫ I dt

i havent tried it yet but this is what the question looks like>>>>>

This is just normal definite integration without the use of any special technique. You can split the current into 2 parts - constant part and varying with respect time part

$\int^b_a \text{constant} dt = [\text{constant} \times t ]^b_a$

$\int^b_a e^{nt} dt = [(1/n) e^{nt}]^b_a$