exam Maths Puzzle Numerical Ability

Autimotive Trades - What lenth on the circumference would a 20 degree angle span on a 16 inch. Fly-wheel? Round to the nearest hundredth.

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exam Other Question

solve for x:
7^x=200

please show workings
In 2005, Dan raced his car 500 miles. His rate was 157.603 mph. What was his time (to the nearest thousandth of an hour)?