Given that −5 ≤ a ≤ 15 and 4 ≤ b ≤ 9, which of the follow...

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PS · Problem Solving

505-555

Inequalities

Given that −5 ≤ a ≤ 15 and 4 ≤ b ≤ 9, which of the following represents the possible values of ab?

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A

−45 ≤ ab ≤ 135

B

−45 ≤ ab ≤ −20

C

−20 ≤ ab ≤ 45

D

−20 ≤ ab ≤ 135

E

45 ≤ ab ≤ 135

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