Tin

A new school has opened with fewer than 500 students. 1/3 of the students is a whole number. So are 1/4, 1/5 and 1/7 of the students. How many students go to this school?

a swimming pool is 25 m long and 10 m wide and is filled to an average depth of 1.5 m how many kilogram of water does it contain?

1/2sin 2x -1/2 =0 , 0is less than or equal to 0<2 pie, radian measure is x1? X2?

1/2sin 2x -1/2 =0 , 0is less than or equal to 0<2 pie, radian measure is x1? X2? Fill in only intergral values.

30c

(1)For an alkane which only has a straight main chain with 20 carbon atoms, there will be 20*2 +2 = 42 hydrogen atoms. (2) When adding a ring into the main chain, subtract 2 hydrogen atoms. This is because when adding the ring, you are actually adding two...

Aig'ht thanks...