There is a sales tax of $14 on an item that costs $147 before tax. a second item costs $84 before tax. what is the sales tax on the second item? a> $7.56 b> $8.50 c> $8.00

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.°

I’m really confused and need to learn this

The product of sin 30 degrees and sin 60 degrees is same as the product of