What would be the intersecting points of this graph? Let me know if you guys can’t read the font.

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

Me i’m stuck on all these questions besides the two bottom ones

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