In this figure, sin(a) =  23what is the value of cos(b) ? a)13b)23c)23d)32 and show work if possible

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

If the discriminant if a quadratic equation is 4 which statement describes the roots?