1. In a vacuum, the wavelength of light from a laser is 630 nm (630 x 10-ºm). What is the frequency of the light?

Prove the divisibility of the following numbers: 25^9 + 5^7 is divisible by 30.also, read as (25 to the power of 9) + (5 to the power of 7) is divisible by 30. blank x 30what is the blank? ( it should be expressed in exponent form)

Solve 4 ln x=2ln25 a) x=5 b) x=25 c) x=625

Can someone me with this? i’m not sure what to put for my equations.