Quincy drew a map of Galveston Island. In the scale Quincy used for the map, 2 centimetres represents 10 kilo meters. Galveston Island is actually 43.5 kilo meters long. What is the length in centimetres of Galveston Island on Quincy's map?

8.7cm

Step-by-step explanation:

From the question, we know that:

10 km = 2 cm(on the map)

43.5 km = x cm

Cross Multiply

10 × x cm = 43.5km × 2

x cm = 43.5 km × 2/10

x cm = 8.7 cm

The length in centimetres of Galveston Island on Quincy's map is 8.7cm

5

Step-by-step explanation:

Subtract the initial fee.

Remaining amount=

For every hour there is a 3$ charge.

We have 15$.

Thus the number of hours she kayaked =

$\frac{15}{3}=5$