exam Maths Puzzle Numerical Ability

[2c+4.5d]-[-1.5c+1.5d]

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exam Other Question

David opened his piggy bank and found 3 pennies, 5 nickels, and $2.95 in dimes and quarters. Find the greatest number of quarters he could have if he had an odd number of dimes. Express in exponential form. (use ^ to denote exponents and do NOT use spaces
log^(8)512=3