Please helppp. Find the measure of each arc in circle b.

Find a third-degree polynomial equation with rational coefficients that has roots -2 and 6+i

Aliaa is skating down a ramp. the wheels on her skateboard have diameters of 60 \text{ mm}60 mm60, space, m, m. what is the distance aliaa travels when her skateboard wheels make 202020 revolutions? round your answer to the nearest \text{mm}mmm, m.

Acar travels 85 kilometers per hour. what is the equivalent speed in meters per hour?