A 22-ft ladder leans against a building so that the angle between the ground and the ladder is 70°. How high does the ladder reach on the building? (Round your answer to the nearest foot.)

The value of height does the ladder reach on the building = 21 ft

Explanation:

length of the ladder = 22 ft

Angle between the ground and  the ladder = 70°

Now we have to calculate ( h ).

From the triangle ABC ,   =

⇒ h = × 22

Put the value of = 70° we get,

⇒ h = 70° × 22

⇒ h = 21 ft

This is the value of height does the ladder reach on the building.

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.