exam Maths Puzzle Numerical Ability

can someone please help me with this question:

Is this function always increasing, decreasing, remaining constant, or there is no way to know ?

y = 0(-x + 1)

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exam Other Question

when ^ means square root

^3(^20+2^8) =

5^12+4^32-5^27 =

4^5/^72 =
Problem 6-66. New Process, Inc., a large mail-order supplier of women's fashions, advertises same-day service on every order. Recently the movement of orders has not gone as planne