Physics math problem, please help I'm really confused. At 5:30 pm, Stacey was driving her car at a speed of 25 mph on a straight avenue. Suddenly she notices that she had forgotten to bring her purse, so she immediately makes a U-turn and heads back to her house. Now she looks at her watch, which says 6:00 pm. If her current speed is 40 mph, what is the magnitude of her average acceleration from 5:30 to 6:00 pm in miles per hours squared?

A) 65
B) 15
C) 130
D) 140

a.   mass number from atomic number

first thing first of the answer is with technology. second thing second thing is that the big bang theory did not happened u see they say it did but what they dont realize is that like dinasures are still a round they might deny it but they and look at these 12 foot human skelteons they find lets see didnt the bible say something about giants. hope this peace.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.