In analyzing distances by applying the physics of gravitational forces, an astronomer has obtained the expression. R = 140 × 109 mUse your calculator to evaluate R. a. 3.87 x 10-12 mb. 1.72 × 1011 m c. 2.58 x 1011 m d. 1.49 x 1011 m

real, smaller and upside-down.   so the answer should be b.

momentum of soft ball three times less than baskey ball

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )