On problems 13-18, solve for x. Determine the angle type to see if they are equal or if both given angles add up to 180. Remember, only Same-Side Interior & Same-Side Exterior Angles = 180, everything else is congruent. Level 3.0

Evaluate cos2θ for cosθ = square root of 3/2

The bottom of ignacio's desktop is 74.5cm from the floor. ignacios sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk.

Which has the greater energy, light of wavelength 519 nm or light with a frequency of 5.42 x 10^8 sec^-1?