What the answer to this

C

Step-by-step explanation:

i⁰ = 1

i¹ = i =

i² = -1

i³ = i².i = -1.i = -1

i⁴ = i².i² = -1.-1 = 1

i⁵ = i⁴.i = 1.i = i

so, looking only i¹,i², i³, i⁴ is easier

19 / 4 = 16 + 3 => (4 x 4 ) + 3

so, we'll look i³

i³ = i².i = -1.i = -1

Hope this helps ^-^

x =-.20752

step-by-step explanation:

4^(x+2)=12

4^(x+2)=12

take the log base 4 on each side

log 4 (4^(x+2) = log 4(12)

we know log b(a^y) = y log b (a)

(x+2) log 4(4) = log 4 (12)

x+2 = log 4 (12)

we know   logb c = loga c/loga b

we want to convert to base 10   so a = 10

by default, we do not write the 10   c = 4   and b = 10

log4 10 = log 12/log 4

log4 10 = log 12/ log 4

x+2 = log 12/ log 4

subtract 2 from each side

x +2 -2 = log 12/ log 4 -2

x = 1.79248125 -2

x =-.20752