The box plot shows the number of years during which 16 schools have participated in a marching band competition:

at least how many schools have participated for 3 to 7 years?

3 schools
5 schools
7 schools
8 schools

From the given box and whisker's plot, we have

Now, we know that there is half data distributed between the lower and upper quartiles.

Also, we have to find that how many schools have participated for 3 to 7 years. It means we need to find the number of years in between Q1 and Q3.

The total number of schools is 16.

Hence, number of schools have participated for 3 to 7 years is given by half of the total number of schools.

=

Therefore, 8 schools have participated for 3 to 7 years.

D is the correct option.

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.