 <translate> On Tuesday, Billy ate 2 * 2 = 4 apples. On Friday, he ate 2 * 0.5 = 1 apple. On Thursday, he ate 4 * 1 = 4 apples. So for Monday, Tuesday, Thursday, and Friday, Billy ate a total of 2 + 4 + 4 + 1 = 11 apples. This means that on Wednesday, he must have eaten 20 – 11 = 9 apples. So, the answer is 9. <yor> Lọ́jọ́ Tuesday, Billy jẹ èso ápù mẹ́rin. Lọ́jọ́ Friday, ó jẹ èso ápù kan. Lọ́jọ́ Thursday, ó jẹ èso ápù mẹ́rin. Nítorí náà, ní ọjọ́ Monday, Tuesday, Thursday, àti Friday, Billy jẹ èso ápù méjì pọ̀ mọ́ mẹ́rin pọ̀ mọ́ mẹ́rin pọ̀ mọ́ ẹyọ kan, èyí sì jẹ́ mọ́kànlá. Èyí túmọ̀ sí pé ní ọjọ́ Wednesday, ó ti ní láti jẹ 20 <unk> 11 = 9 èso ápù. Nítorí náà, ìdáhùn náà ni 9. 