exam Maths Puzzle Numerical Ability

Pi and the square root of two are rational numbers, since they can be expressed as the ratio of two intergers. is this true or false?

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exam Other Question

Please help me with this homework question!Simplify B to the 7th power divided by B to the 2nd power times b to the 3th power. I just get confused with problems such as:

y=(1/8)x^2

I need to find the x-intercepts, but I do not know how to put the equation into the form that is needed. I believe it is standard form.