A step function consisting of four line segments is plotted in quadrant 1 of a coordinate plane.
The cost for shipping by the Boston Mailing Company is based on the amount that a customer spends. For customers spending under $50, the shipping rate is $10; for $50 to under $100, the shipping rate is $7; for $100 to under $140, the shipping rate is $4; for $140 and over the shipping rate is $2. What domain interval will have a shipping rate of $4?
(1 point)
Responses
100≤s<140
100 less than or equal to s less than 140
100<s≤140
100 less than s less than or equal to 140
50≤s<100
50 less than or equal to s less than 100
100<s<140
1 answer
The shipping rate of $4 applies to customers spending from $100 to under $140. Therefore, the correct domain interval for a shipping rate of $4 is:
100 ≤ s < 140
This means that for spending amounts starting from $100 up to but not including $140, the shipping rate is $4.
