Powers, roots and standard form

Question

The engine of a new aircraft had a major inspection after 1.2x10⁴ hours flying time. The aircraft flies at an average speed of 900 km/h. 

 

Calculate the distance travelled by the new aircraft before its engine had a major inspection. Give your answer in standard form.

 

--p.s. Thankyou for taking your time in helping me but please could you show working in a suitable format for a 15 year old to understand, Thankyou. 

Answer 1

d = r · t

d = 900 kph · 1.2 x 10⁴ h

d = 1080 x 10⁴ k

d = 10800000 k

 

The plane flies ten million eight hundred thousand kilometers.