The mass of a freight train is 9.98 • 10^6 kilograms. the mass of an aircraft carrier is 7.3 • 10^7 kilograms. approximately how many more kilograms is the mass of an aircraft carrier than the mass of freight train? show your work and write your answer in scientific notation.

Train: 9.98 x 10^6 = 9,980,000 kilograms

Aircraft carrier: 7.3 x 10^7 = 73,000,000 kilograms

Subtract:

73,000,000 - 9,980,000 = 63,020,000 kilograms.

Written in scientific notation: 6.3 x 10^7

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.