What is measure of angle r?

enter your answer as a decimal in the box. round only your final answer to the nearest hundredth.

°
p q r is a right triangle. q is a right angle. p q is equal to five centimeters, q r is equal to twelve centimeters and p r is equal to thirteen centimeters.

The measure of angle R is

Step-by-step explanation:

we know that

In the right triangle PQR

The cosine of angle R is equal to divide the adjacent side angle R by the hypotenuse

so

substitute the values

see the attached figure to better understand the problem

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m