Answer: $9.81
Step-by-step explanation:
Here, Tiffany buys a basket of watermelons on sale for $9 before tax.
Therefore, Initial cost of a basket of watermelons = $9
And, he sales tax is 9%.
Therefore tax on a basket of watermelons,
9% of 9 = 
But, The total cost of a basket of watermelons = initial cost + tax
= 9+0.81=9.81
Therefore, Tiffany pays $9.81 for the basket of watermelons.
The answer is 1:11. After it being simplified from 6:66. Hope this helps.
Scale factors of negative numbers are contractions
scale factors of numbers greater then 1 are expansions
scale factors of numbers greater then 0 but less then 1 are contractions
Let, the total number of students in school that ride the bike to school be "x"
Now,
Using ratio and proportion, we get,





So, out of 800 students, 125 ride their bike to school.
Answer:
it's B I think because I worked it out and I got B