Find sin θ for θ = 45°

Abike shop sells you a bicycle for $63 and a helmet for $21. the total cost is 150% of what the shop spent originally. how much did the shop spend originally? how much profit did the bike shop earn by selling the bicycle and helmet to you ?

Write an equation in point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle