Solve By Writing a compound inequality

A baker needs between 40 lb and 50 lb of flour-sugar mixture that contains ten times as much flour as sugar. What are the possible
weights of flour the baker can use?
a. between 36.4 lb and 45.5 lb flour
c. 38.9 lb and 39.7 lb flour
b. between 45.5 lb and 56.1 lb flour
d. 31.8 lb and 34.9 lb flour