exam Maths Puzzle Numerical Ability

Please help me solve this. Thank you.

Multiply
-3a^2b over 35a^5 times 14a^3b^2 over -9b^4

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exam Other Question

margo and tony had a running race. margo ran 10 feet farther than tony. together they ran 64 feet. how far did each person run? Nancy can paint a house twice as fast as Terry can. They year they worked together it took them 7 days. How long would it take each to paint the house alone?