Diagram 1 shows a cyclic quadrilateral PQRS. Given that PQR=130°, PQ=5 cm, QR = 7.3 cm and RS = 11.8cm.
Calculate
(a) the length of PR,
(b) ZPRS,
(c) the area of quadrilateral PQRS.
(d) the shortest distance, in cm, from point S to PR.​

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.