Question

next, choose the best buy. circle the letter next to your answer.

1. e. $3.33\over4.5$ lb l. $2.28\over3$ lb c. $2.92\over4$ lb
2. o. $45.36\over21$ gal b. $38.97\over18$ gal t. $57.25\over25$ gal
3. s. $2.16\over36$ min a. $3.30\over60$ min g. $5.04\over72$ min
4. p. $34.32\over8$ yd w. $49.92\over12$ yd r. $65.44\over16$ yd

write the letters that are next to your answers above the

Explanation:

Step1: Calculate unit price for #7

E: $\frac{\$3.33}{4.5\ \text{lb}} = \$0.74/\text{lb}$
L: $\frac{\$2.28}{3\ \text{lb}} = \$0.76/\text{lb}$
C: $\frac{\$2.92}{4\ \text{lb}} = \$0.73/\text{lb}$

Step2: Calculate unit price for #8

O: $\frac{\$45.36}{21\ \text{gal}} = \$2.16/\text{gal}$
B: $\frac{\$38.97}{18\ \text{gal}} \approx \$2.165/\text{gal}$
T: $\frac{\$57.25}{25\ \text{gal}} = \$2.29/\text{gal}$

Step3: Calculate unit price for #9

S: $\frac{\$2.16}{36\ \text{min}} = \$0.06/\text{min}$
A: $\frac{\$3.30}{60\ \text{min}} = \$0.055/\text{min}$
G: $\frac{\$5.04}{72\ \text{min}} = \$0.07/\text{min}$

Step4: Calculate unit price for #10

P: $\frac{\$34.32}{8\ \text{yd}} = \$4.29/\text{yd}$
W: $\frac{\$49.92}{12\ \text{yd}} = \$4.16/\text{yd}$
R: $\frac{\$65.44}{16\ \text{yd}} = \$4.09/\text{yd}$

Step5: Select lowest unit price

Choose the option with the smallest value per unit for each set.

Answer:

1. C. $\frac{\$2.92}{4\ \text{lb}}$
2. O. $\frac{\$45.36}{21\ \text{gal}}$
3. A. $\frac{\$3.30}{60\ \text{min}}$
4. R. $\frac{\$65.44}{16\ \text{yd}}$