Question

ori needed at least $1.47 in postage to mail an envelope to his cousin overseas. if x represents the number of $0.44 cent stamps he has and y represents the number of $0.10 cent stamps he has, the inequality representing the number of stamps he can use to mail the envelope is 0.44x + 0.10y ≥ 1.47. if ori uses all 3 of the $0.44 cent stamps he has, what is the minimum number of $0.10 stamps he needs to use?
○ 1
○ 2
○ 3
○ 5

Explanation:

Step1: Calculate value of 3 $0.44 stamps

$\text{Total from } \$0.44 \text{ stamps} = 3 \times 0.44 = 1.32$

Step2: Find remaining postage needed

$\text{Remaining postage} = 1.47 - 1.32 = 0.15$

Step3: Calculate minimum $0.10 stamps

$\text{Number of } \$0.10 \text{ stamps} = \lceil\frac{0.15}{0.10}
ceil = 2$
(We round up since partial stamps can't be used)

Answer:

2