A car is traveling south at a speed of 54 miles per hour and then begins traveling at a speed of 55 miles per hour but continues traveling in the same direction. Which of the following has changed? A. mass
B. volume
C. velocity
D. density

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

the answer is 3.1 his answer is wrong mines is right

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2