She left a 15 % tip I hope this helps u :D
Answer:
ok good luck jsjsksksksksks
Answer:

Step-by-step explanation:
- Calculate the ratio of the progression by dividing a term of it by the immediately preceding one.

- We simplify the fractions:

Since the ratio is the same, that is the common ratio.
<h3><em><u>MissSpanish</u></em></h3>
The length would be 9, and width would be 6.
The selling price is <u>$29.40</u>
<h3>
EXPLANATION</h3>
10% of $21 = $2.10
$2.10 x 4 = $8.40 = 40%
$21 + $8.40 = <u>$29.40</u>
Hope this helps!