I need to find the amount of money the fourth teacher pay. See picture! Thanks?!

Answer 1
Full Price: #$60# 1st teacher: Pays 1/3 of final cost : #$20# 2nd teacher: Pays 1/4 of final cost : #$15# 3rd teacher: Pays 1/5 of the final cost: #$12# 4th teacher: Pays the remainder: #$13#
The method: To find out how much each one paid, the same method is used for all. The relative percentage they paid is given, for e.g. the first teacher paid #1/2# the sum of money the other teachers paid so this means that if the other teachers paid #$50#, she paid #$25#, #$25 + $50 =$75, 25/75 = 33%# Therefore she paid 1/3 of the final cost being #$20#
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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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