Important
the world's population has grown at an average rate of 1.9 percent per year since 1945. there were approximately 4 billion people in the world in 1975. which function represents the world's population p, in billions of people, t years since 1975? (1 billion = 1,000,000,000)

a. p(t)=1.19t+4
b. p(t)=1.019t+4
c. p(t)=4(1.9)^t
d. p(t)= 4(1.019)^t

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.

the expression (1.26)2t reveals the approximate rate of increases in the number of plants semiannually.

hope this : )