Suppose a function satisfies f(0)=1 and f(2)=-1. What can we say about the roots of the function between 0 and 2? Nothing...we need more information
There is at least one root, possibly more
There is exactly one root
There is at most one root, possibly less

There is at least one root, possibly more. This is coming from the intermediate value theorem.

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.

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step-by-step explanation: