exam Maths Puzzle Numerical Ability

Please help me solve

Find the domain and the range of the functions f(x), g(x), and h(x)

if
f(x)= 7x-40
g(x)= 70
h(x)= -x^2 + 6x

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exam Other Question

100-(x-5)^2 If ship is anchored at origin of 3 dim. coordinate sys. and 2 probes are sent below the surface, 1st probe stops at (-8, -4, 6) and 2nd probe stops at
(4, -9, -2) which probe is farather from the ship?