1.
Calculate the volume of the following cylinders.
Radius = 10 cm
Height = 20 cm

2000pi

Step-by-step explanation:

V of a cylinder = Area of the base × height

Area of a circle = pi × r^2

A = pi × (10)^2 = 100pi

V = 100pi × 20 = 2000pi

44

step-by-step explanation:

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2