Arock climber's elevation above sea level changed −82 1/2 feet in 2 1/4 minutes as she descended.
what was the climber's average change in elevation per minute?
enter your answer as a mixed number, in simplified form, in the box.
answer quickly , .

Step-by-step explanation:

The elevation changed in . To find the ratio of change of such elevation, we just have to divide these quantities. However, we need to transform each mixed number into a fraction, as follows

Then, we divide

Therefore, the ratio of change expressed as a mixed number is

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.

b

step-by-step explanation: