1. for safety concerning a curve, you should: a. decelerate before the curve
b. accelerate while driving up the curve
c. shift to a higher gear
d. adjust your speed to the current road conditions

In the question "For safety concerning a curve, you should" the correct answer is "decelerate before the curve" (option A) Decelerating before the curve gives you the opportunity to navigate the curve adequatery and be able to contain any on-coming vehicle.

Divide 108.2 x 10^6 into 1.5 x 10 and the result will be in au (astronomical units)