Answer the following.(a) The signal from a certain satellite takes approximately 0.013 seconds to reach Earth. Write this number in scientific notation.(b) The total surface area of Africa is approximately ×1.17107 square miles. Write this number in standard notation.

The total surface area of Africa is approximately ×1.17107 square miles. Write this number in standard notation.

Earth can be modeled by a sphere with a diameter of 7,918 miles. Given that 29% of Earth’s surface is land, which of the following is closest to the total area, in square miles, of land on Earth?Responses5.7×107Answer A: 5.7 times 10 to the seventh powerA2.3×108Answer B: 2.3 times 10 to the eighth powerB7.5×1010Answer C: 7.5 times 10 to the tenth powerC

A satellite orbits earth at a speed of 22100 feet per second (ft/s).  Use the following facts to convert this speed to miles per hour (mph).1 mile = 5280 ft1 min = 60 sec1 hour = 60 minRound your answer to the nearest whole number. Be sure not to round until you have completed all the calculations.Do not type the units in the space below.

A satellite orbits the earth a distance of 16,405,682 m above the planet's surface and takes 5.05 hours for each revolution about the earth. The earth's radius is 6,380,000 m. What is the acceleration of this satellite?Note: Write your answer in normal format up to 2 decimal points. Example: 12.34. Please DO NOT write the units in the electronic format. Definitely, write the units on paper. If I don't find the units in your hand-written notes, then marks will be deducted.

Because of their low height, LEO satellites can relay signals very quickly. The delay between sending and receiving a signal can be as short as 0.02 seconds.Calculate the delay for geostationary satellites using the equation:time= speeddistance​ Hint: Remember to double the satellite's height to find the total distance travelled by the signal. Assume the signal travels directly up and down.