Kedwin can watch movies at home in two ways. he can order unlimited online movies for $10 a month. he could also go to the local
movie rental store and rent 5 movies for $4.00. the system representing this scenario is graphed below.
How many movies does kedwin need to rent each month to make the online option a better deal?
a- 10 movies per month
b-10.40 movies per month
c- 12.5 movies per month
d-13 movies per month
How many movies does kedwin need to rent each month to make the online option a better deal?
a- 10 movies per month
b-10.40 movies per month
c- 12.5 movies per month
d-13 movies per month
2 answers:
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Answer:
= - 4 cm/s
Step-by-step explanation:
Let us revise the chain rule
If = a and
= b, then
=
÷
=
∵ y = x² + 1
- Use the differentiation to find
∴ = 2x
∵ x = -1
- Substitute x by -1 in
∴ = 2(-1)
∴ = -2
∵ =
×
∵ = 2 cm/s
∴ = (-2) × (2)
∴ = - 4 cm/s