On a trip, you had to change your money from dollars to british pounds.  you got  560  pounds for  800  dollars.  which is a unit rate that describes the exchange

1 dollar = 0.70 pounds

Step-by-step explanation:

On a trip, you had to change your money from dollars to British pounds.

You got 560 pounds for 800 dollars.

Therefore, for for 1 dollar =

                                          = 0.70 pounds

The unit rate is 1 dollar = 0.70 pounds

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6