Jack correctly guesses the answer to a question 78% of the time. If he guess for all 34 questions assuming that each question is independent of the next. What are the mean number of correct questions we would expect?

the balance is found at the link

step-by-step explanation:

step- i d k and i d c : )

you: : 0

bye

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.