exam Maths Puzzle Numerical Ability

Simplify the expression (625x^4y)^1/4 / (81xy^3)^3/4

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exam Other Question

I am so confused on these problems could someone help me understand what i am suppose to be doing? I am to solve the following inequalities for x

{{{X+4>7}}}

{{{3x<1112}}}
At sea level and at a temperature of 32degree F, sound travels 1088 ft/sec.

a. write a function that gives the distance sound travels as a function of time.

b. Make a table o