Mathematics Tutor: None Selected Time limit: 1 Day

Jul 2nd, 2015

8) log 10^x = 3

log 10^x = 3 =>    10^3 = x

x= 1000 so B is the correct one

9)

f(x)= 2x+1

g(x)= (x-1)/2

f(g(x)) = 2((x-1)/2)+1

f(g(x)) = (x-1)+1

f(g(x)) = x-1+1

f(g(x)) = x

So A is correct one

10)

sinθ = 1/2

θ = sin ^-1 (1/2)

θ= 30

cos 30 = sqrt(3) / 2

so option D is correct

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Jul 2nd, 2015
Jul 2nd, 2015

total area of box= 130

A= a^2

130= a^2

a=sqrt(130)

perimeter = 4a

perimeter= 4* sqrt(130)

so option A is correct

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Jul 2nd, 2015

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Jul 2nd, 2015

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Jul 2nd, 2015
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