PEMDAS
(9)(5) + 8
45 + 8
53
It's because a tenth means that you've divided it by 10. So if it's 20, it means you're multiplying tenths by 20, leaving you with 2 wholes.
For example, you have 2 cakes and you cut each into 10 slices, the slices are each one tenth of the whole cake, and in total there are 20 tenths.
Answer: C Hope it's helpful
5.1 • 0.79 = 4.029
the apples cost $4.03
check the picture below.

it cannot be -1, because is a seconds amount after moving.