Someone answer this pls pls pls

Apossible wavelength for the color blue is 0.000000492 meter. which of the following is a reasonable estimate for this wavelength for the color blue? a. 5 × 10-6 m b. 5 × 107 m c. 5 × 10-7 m d. 5 × 106 m

Guys can y’all me because i don’t understand to the questions of my cousin she tell me to do the homework plz me guys

What is the solution to this system of linear equations? 2x + 3y = 3 tx-3y= 24