D & E are points on the sides AB & AC of triangle ABC such that DE||BC and AD:DB = 4:5. CD & BE intersect each other at F. Find the ratio of ar(DEF) & ar(BCF).

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

If you had $1,900,000, how many days would it take you to spend all if you spent $1 a second. (there are 86,400 seconds in a day)

Need asap. solve for the following inequality