There are 13 books on a shelf. Of these books are new. 9 The rest of them are used. (a) What is the ratio of used books to new books? (b) What is the ratio of all books on the shelf to used books?

a) The ratio of used books to new books is of .

b) The ratio of all books on the shelf to used books is of

Step-by-step explanation:

Ratio of a to b:

The ratio of a to b is given by:

Ratio of b to a:

The ratio of b to a is given by:

In this question:

13 books, 9 used, 4 new.

(a) What is the ratio of used books to new books?

9 used, 4 new. So

The ratio of used books to new books is of .

(b) What is the ratio of all books on the shelf to used books?

13 books on the shelf, 9 used. So

The ratio of all books on the shelf to used books is of

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

nope.   happens to me as well.

-aparri