exam Maths Puzzle Numerical Ability

Find the product or quotient. Write your answer using only positive exponents.

Mass of a dust particle:0.000000000753 kilograms

Any help with this equation woul be GREATLY</b> appreciated.

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exam Other Question

I need help with simplifying:
3/x+1 + 3
/ divided by 3x/x-1 -3. In a walkathon to raise money for a charity Elisa walked a certain distance at 5 mi/h and then jogged twice that distance at 8 mi/h. Her total time walking and jogging was 2h and 15 min. How many miles was the walkathon.