QUIZ 1

1. Complete the following table:

Number Rounded off to3sf 2sf 1sf

a. 570243b. 20354c. 3954d. 483.5e. 69.54f. 8.053g. 0.7023h. 0.06025

2. Find the values of each of the following and express each answer correct to the number of significant fiqures indicated in the brackets.a. 0.028 ÷ 0.02-1.204 [3]

b. 0.68 ÷ 0.2 0.296 [3]

c. 0.3(4-0.38) [2]

d. 0.6 x 0.8276 ÷ 0.12 [1]

3. Express each of the following as a single numbera. 5.2×105=¿

b. 3.8×108=¿

c. 5.24×10−7=¿

d. 6.723×10−5=

4. Express each of the following in standard forma. 456000=

b. 235 x 104=

c. 0.0000734=

5. Solve the quadratic equation

a) y2+11 y+24=0

b) x2−5x−6=0

c) x2=x+30

d) 3 x2−3 x=7 x−3

e) z2−4=0

f) 5 y2=45

g) x ( x+3)=40

h)

x5= 3x+2

i)

3x4

= x2

8

j) x2 + 7x + 12