3. between 1960 and 2000 world population increased by how many billions of people? answer all and i will give brainliest (i'm aware it's not mathematics but answer it )

If a baby uses 15 diapers in 2 days how many diapers will the baby use in a year

Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial

Complete the steps, which describe how to find the area of the shaded portion of the circle. find the area of the sector by multiplying the area of the circle by the ratio of the to 360. subtract the area of the triangle from the area of the sector.