exam Maths Puzzle Numerical Ability

the cost for long-distance telephone call is $0.36 for the first minute and $0.21 for each additional minute or portion thereof. Write an inequality representing the number of minutes a person could talk without exceeding $3.

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exam Other Question

Evaluate:

log_2 (1024)^3
p^2-3p+pq-3q,,,,,,,,,,,p-3
___________ Divided by _____
11p^2-11q^2,,,,,,,,,,,,,8p-8q

How do i do this? I understand the basic idea, I just don't know how
to get the a