exam Maths Puzzle Numerical Ability

Thank you in advance for helping me with writing this problem in interval notation. t-1/t-5<=2

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exam Other Question

the problem is: Find the next term in the sequence 1/2, -4, 32 _

I believe the answer to be -256

could someone please tell me if I am correct?
if it takes a person 50 seconds to travel one mile, what is his or her speed in mph?