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pls help me with 11 and 12

Nathan is raising money for a bike-a-thon. His aunt pledged $10 plus $1.75 for every mile
he bikes. On the day of the bike-a-thon, Nathan biked 10 ¼ miles.
11.Which expression represents the amount of money Nathan will collect from his aunt?
A. 10 + 1.75
B. 10 + 1.75 + 10.25
C. 10 + 1.75(10.25)
D. 11.75(10.25)


12. How much money will Nathan collect from his Aunt?







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