1 hour MATHEMATICS
[60 marks]
Answer four questions in all. All questions carry equal marks.
h
(a)
If
U = {x CN; xẤ20}
A = {x: 1<x<10, where x is a composite number} B= {prime factors of 40},
C = {x: 1<x< 20, where x is a square number}
(i)
List the member of
a. A'UB
B. (A n B!) u C!
Y. (AluC)
8. U
(
ii)
Prove that union (u) is associative with respect to set A, B and C.
O

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

copy and paste, put it in google

the infinity sign

step-by-step explanation: