Elaine lives in Hawaii, which has a sales tax of 4%. She just bought a swimsuit whose full price was $80, but she presented the
2 answers:
Answer:
A : $67.60
Step-by-step explanation:
Given:
Sales tax = 4%
She just bought a swimsuit whose full price was $80,
She presented the retailer with a coupon for $15,
Question asked:
What was the total amount that Elaine paid?
Cost price of swimsuit = $80,
She presented the retailer with a coupon for = $15,
Remaining price = 80 - 15 = 65
Now, sale tax imposed = 4% of 65
=
Sale price = Remaining price after deducting coupon + sale tax
= 65 + 2.60 = 67.60
Thus , $67.60 Elaine paid to the retailer.
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Answer:
Step-by-step explanation:
Given:
The level of a lake is falling linearly.
On Jan 1, the level is 452 inches
On Jan 21, the level is 378 inches.
Now, a linear function can be represented in the form:
Where, 'm' is the rate of change and 'b' is initial level
So, let Jan 1 corresponds to the initial level and thus b = 452 in
Now, the rate of change is given as the ratio of the change in level of lake to the number of days passed.
So, from Jan 1 to Jan 21, the days passed is 21.
Change in level = Level on Jan 21 - Level on Jan 1
Change in level = 378 in - 452 in = -74 in
Now, rate of change is given as:
Hence, the function to represent the lake level is
Where, 'x' is the number of days passed since Jan 1.