Answer:
OH TY LOL
Step-by-step explanation:
<em>If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up (+1).</em>
<em>If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down (no change).</em>
81.1<u>3</u>9 ≈ <u>81.1</u>
(17-7)*2=weekly allowance
so her weekly allowance is 20