This problem is about componded interest. The formula for compounded interest is:

In this case, Initial = 300, r = 0.06 and t=10 so the total amount in the account after 10 years is:

The amount after 10 years is 573.26.
The answer is C. 21/50 is 0.42. 7/50 is 0.14. 19/50 is 0.38. 43/50 is 0.86. To convert a fraction to a decimal, you will have to divide the numerator by the denominator.
Hope this helped.
More, a kilogram is 1000x the mass of a gram
You earn $15.00 for mowing one lawn.
15*7=105
You earn $105.00 for mowing 7 lawns.
I think its the first one