What is the measure of ∠f? a. 55° b. 76° c. 125° d. 159°

Idont get this question can someone me solve it? ** the distance light travels in one second (1 light second) is about 1.86 ×10^5 mi. saturn is about 475 light-seconds from the sun. about how many miles from the sun is saturn..my guess is 8.83* 10^7 you so much

Which expression is equivalent to? assume x > 0 and y > 0.

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?