more maths q's?

Question

a) complete pattern:

2,2,4,6,10 _ _

b) Express 0.0175 in scientific notation

c) How many litres in 0.8 megalitres?

d) A container 3m by 4m by 2.5m is to be given a coat of paint on all surfaces, inside and out. If 1 litre of paint covers 10 m^2, how many 4 litre tins of paint are required?

e) Martha, Tamara and Virginia each prepared a list of history's most influential people. The lists were compared and any names that appeared on at least two lists were shortlisted. Of the names on the shortlist 45 had been included on Martha's list, 34 on Tamara's list, and 28 on Virginia's list. What is the maximum number of names that might have reached the shortlist?

Answer 1

(a)2,2,4,6,10,16,26

like fibonacci

(b)1.75*10^-2

(c)0.8*10^6 litres

(d)total surface area = (2.5*4)*4+(3*4)*4+(2.5*3)*4=108m^2
108/10 = 10.8 litres of paint
10.8/4=2.7 so 3 cans (assume it has a lid)


(e)45+43+28? assume no doubles so...maximum
=116 people

Answer 2

a)2,2,4,6,10,16,26

b)0.0175=1.75*10^-2

c)1ML = 10^6 L
Therefore, 0.8ML = 8*10^5 L

d)Surface area = 4(3*4+3*2.5+4*2.5) = 118m2
Therefore, no of tins needed = 118/40 = 3(nearest whole no)

e)Min intersection of all 3 = 34+28-45 = 17
Therefore, max no on list = 34+28+45-17 = 90

Not too sure about part e though...

Answer 3

(a)2,2,4,6,10,16,26
(b)1.75*10^-2
(c)0.8*10^6 litres
(d)total surface area = (2.5*4)*4+(3*4)*4+(2.5*3)*4=10...
108/10 = 10.8 litres
10.8/4=2.7 so 3 cans
(e)45+43+28? =116 people

Answer 4

(1) 2, 2, 4, 6, 10, 16, 26.........
(2) 1.75*10^(-2)
(3) 800000
(4) 3
(5) 53


Doug

Answer 5

c.

0.8 x 1000 x 1000 x 1000
o.8 time kg,,giga,mega

so 800000000 kg.

not sure

Answer 6

a)18,18
b)1.75 * 10(3rd power)
c)80000megalitres
d)3
e)36

Answer 7

a) 2,2,4,6,10,16,26,42,...
b) 175/10000=7/400
c) 800000 litres

Answer 8

are you having a hard time in answering that questions?