28:32. That is 28 to 30 dimes hoped I helped you
The notation in its current form isn't entirely clear.
Did you mean to write
? The 4 isn't in the square root.
If so, then the expression is in simplest form because we cannot simplify
any further (note how 10 doesn't have any perfect square factors other than 1).
Also, the 3/4 portion is fully reduced already.
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Or,
Did you mean to write
? This time the 4 is inside the square root.
If so, then we can simplify like this

This means that 
The price of the row boat with the additional 6% would be $843.76
Stevie has 25marbles
Freddie's has 25x2:50marbles
Danny has 50+5:55marbles