Question

*** PLEASE HELP EVEN FOR JUST ONE OF THE QUESTION WOULD REALLY HELP ME***
There were 135 space missions for a cost of 2 billion dollars. 945 astronauts rode these missions. Speed is 26,000 miles per hour at an altitude of 162 miles; Radius of earth 3959 miles. 5 pounds of food per astronaut per day. Two meals per day. Total weight in pounds carried aloft 3,513,638. Total weight in pounds returned to earth 229,132. Total time in space for all missions: 1755 days. 24 tweets per astronaut per day.


What I need help with finding:

-Average hours per orbit
a. 0.957 approximately
b. none of the other choices
c. 1.142 approximately
d. 1.018 approximately
e. 0.996 approximately

-Orbits per average mission
a. 313.253
b. 302.879
c. 180.642
d. 156.289
e. none of the other answers

-The number of orbits for all 135 missions
a. 40889 approximately
b. 24387 approximately
c. 21099 approximately
d. none of the other answers
e. 42289 approximately

-Average dollar cost per orbit of Earth
a. 48913
b. 94791
c. 47293
d. 82011
e. none of the other answers

Answer 1

The distance covered in one orbit is equal to the circumference of earth.

Given that radius of earth is 3959 miles.

Circumference of earth= 2πr = 2*3.14*3959 = 24875.13 miles

Speed is 26,000 miles per hour.

Since, Velocity= Distance/Time

Time= Distance/Velocity = 24875.13/26000

Time = 0.9567 hours

Therefore,

Average hour per orbit is 0.957 approximately.