The best type of tooth brush to choose should be hard and certified by the American Dental Association True or False

That is true because if is not certified by the American Dental Association  because if its not then nobody knows if it was made with animal sin or animal fat Etc

Step-by-step explanation:

the answer is d. (1.2, -4.7) on edgn

hope this !

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.