Find the slope of the line passing through the pair of points or state that the slope is undefined. Then indicate whethe the line through the points rises, falls, is horizontal, or is vertical. \( (-9,-6) \) and \( (-9,7) \)

\( 16 \quad \) How long is an arc intercepted by the given central angle in a circle of radius 3.97 km ?

7. \( m \angle \mathrm{~A}=40^{\circ}, m \angle \mathrm{~B}=88^{\circ}, a=15 \) Find \( b \).

Examine the graph of the circle at right. Homework Help a. What is the equation of the circle? b. On graph paper, sketch the graph of \( x^{2}+y^{2}=81 \). What is the radius?

19. Бір тузу бойында 13 нукте болса, неше вектор жасауға болады? (A) 156 (B) 160 () 144 () 132

В треугольнике \( A B C \) к стороне \( A B=6 \) см опущена высота, длина которой составила 22 см. Найди площадь этого треугольника и дай ттвет в квадратных сантиметрах.