5- A colony of insects doubles every 10 days. If the colony had 1920 insects today,

a) how many were there 40 days ago?

b)How many are there in 20 days?

c)How long would it take for there to be 245 760 bugs?

d)How long would it take, to the nearest decimal place, for there to be 2million bugs?

show an equivalent expression to each of the following functions using the indicated base.

a) f(x)= 81^3x-1 using base 9 (81 is to the power of 3x-1)

b)F(x)=5*625^2(x-1) ( 625 is to the power of 2(x-1) base of 5

c) f(x)= (1/64)^x+2 base of 2 (1/64 is to the power of x+2)