Leon has 4 boxes. each box has 15 golf balls and 12 tennis balls.
which expression shows the total number of balls leon has in the boxes?
a. 4 × 12 × 4 × 15
b. 4 + 12 + 4 + 15
c. (4 × 15) × (4 × 12)
d. (4 × 15) + (4 × 12)

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.°