Длина прямоугольника равна́ 30 см. Какой станет длина, если при неизменной площади ширину прямоугольника увеличить в 1,5 раза? Укажите искомую длину в сантиметрах.

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

\( 1 \leqslant \quad \begin{array}{l}\text { Two gears are adjusted so that the smaller gear drives the } \\ \text { larger one, as shown in the figure. If the smaller gear } \\ \text { rotates through an angle of } 270^{\circ} \text {, through how many } \\ \text { degrees will the larger gear rotate? }\end{array} \)

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

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?

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