In a recent year, 77.8% of recorded music sales were full-length cds, 12.8% digital downloads, 3.8% singles, and the rest a mixture of other formats. a survey of college students and their recent music purchases indicated that out of 200 purchases, 48 were downloads, 135 were full-length cds, 10 were singles, and the rest fit into the "other" category. at the 0.05 level of significance is there sufficient evidence to conclude that at least one of the proportions differs from its original value?

With these 5 geometry questions! pls 1.)quadrilateral abcd is inscribed in this circle.what is the measure of ∠a ? enter your answer in the box.°2.)quadrilateral abcd is inscribed in a circle.what is the measure of angle a? enter your answer in the box.m∠a= 3.)quadrilateral abcd is inscribed in this circle.what is the measure of angle b? enter your answer in the box.m∠b= °4.)quadrilateral abcd is inscribed in this circle.what is the measure of angle a? enter your answer in the box.°5.) quadrilateral abcd is inscribed in this circle.what is the measure of angle c? enter your answer in the box.°