exam Maths Puzzle Numerical Ability

What is the interval notation forthe interval of real numbers shown in the graph

<----l-------[l--------)l------l-------l-----l--->
-50 -40 -30 -20 -10 0

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exam Other Question

Jeb has 15 coins. They are all quarters and dimes. He has a total of $2.10. How many dimes does he have? In 1920, the record for a certain race was 45.6 sec. In 1980, it was 45.0 sec. Let R(t)= the record in the race and t= the number of years since 1920.

a.) Find a linear funct