Please help if you can!

6. A suspect flees the scene of a crime in an unknown direction at a constant speed of 8 miles/hour. Police computers create a circle that includes the area in which they might find the suspect. After 15 minutes, what is the rate at which the area of the circle is increasing? 647 miles/hour 167 miles /hour 327 miles' /hour 47 miles /hour O 4 miles /hour7. The radius of a circle is increasing. At a certain instant, the rate of increase of the area of the circle is three times the rate of increase of its circumference. What is the radius of the circle at that instant? 8. A 13 foot ladder is sliding down a wall at a rate of 2 feet / see. What is the rate at which the bottom of the ladder is moving away from the wall when the top of the ladder is 12 feet high on the wall? 0 4.8 ft/sec O 2.2 ft/sec O 1.7 ft/sec O 3.5 ft/sec O 2 ft/sec 9. The side lengths of a cube are all increasing at a constant rate of 2 inches / hour. What is the rate of change of the volume with respect to time when the volume is 8 in3? 0 81113 /hr 0 24in3/hr O 4x/in3/hr O 16 in3/hr O 4\\/in3/hr 10. A kite is rising into the air at 8 ft / sec. The man holding the kite is a horizontal distance of 50 feet away from the kite, and is releasing the line, which is kept taut. When the kite reaches a height of 70 ft, what is the rate at which the line is being released? Round to three decimal places. 0 8.750 ft/sec O 7.091 ft/sec O 1.229 ft/sec O 9.831 ft/sec O 6.510 ft/sec 50 ft 70 ft 8ft/sec