Ineed the answer asap plz a child rides her bike at a rate of 12.0 km/hr down the street. a squirrel suddenly runs in front of her so she applies the brakes and slows to 8.0 km/hr in 0.25 sec. what is the acceleration of the bike rider during this period? 1.0 km/hr/sec -1.0 km/hr/sec 16 km/hr/sec -16 km/hr/sec

The illuminance of a surface varies inversely with the square of its distance from the light source. if the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters, by how many meters should the distance of the surface from the source be increased to reduce its illuminance to 30 lumens per square meter?