A smartphone costs $120. Sales tax is 5%. What is the total cost, including tax?
1 answer:
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Answer:
answer is b
Step-by-step explanation:
look at the picture
Answer:
There are none.
Step-by-step explanation:
<u>No calculus involved:</u>
The line, in slope-intercept form, has equation , ie is always decreasing (easy to spot applying the definition)
Meanwhile, is always increasing over its domain.
At no point the tangent will be decreasing.
<u>Let's use calculus</u>
We are to solve the equation which has no real solutions.