book Maths Puzzle Numerical Ability

express as a single logarithm: ln7 + 1/2 ln9

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book Other Question

what is 0 to the 0 power?
what is y=(3/5)to the x power?
In the roots and fractional exponents,
what is the square root of 81 with a mini 4 on the top left side of the square root?
The radius of the circular top or bottom of a tin can with a surface area S and a height h is given by

-h +√h^2 + .64s
r =-------------------------------
2

Ac