Jim is designing a seesaw for a children’s park. the seesaw should make an angle of 45° with the ground and the maximum height to which it should rise is 1 meter, as shown below.
what is the maximum length of the seesaw?
a. 0.5 meters
b.1 meter
c. 1.4 meters
d.2 meters

Ithink the versus years?

Planet earth has a mass of 5.9726x10²⁴ kg.then: 5.9726x10²⁴ kg=100% of the total earth mass.if the water´s mass=5x10-4 % of the total mass, we can solve this problem by the rule of three.5.9726x10²⁴ %*10⁻⁴ %x=(5.9726x10²³ kg)(5*10⁻⁴  %) / 100 %=2.9863x10¹⁹ kganswer:   the mass of the planet´s water would be   2.9863 x 10¹⁹ kg.