There is a shortage of bupivacaine 0.5%, a local anesthetic. The pharmacy usually stocks
50 mL of bupivacaine, with preservative, for use when suturing lacerations. The pharmacy can
get empty 50-mL vials, bupivacaine 0.75% preservative free, and sterile water. How much
bupivacaine 0.75% and sterile water is needed to make bupivacaine>
a. 16.7 ml
b. 9 ml
c. 20 ml
d. 10 ml