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jenyasd209 [6]
3 years ago
7

4. Let c(t) be the number of customers in a department store t hours after 8 A.M. Explain the meaning

Mathematics
1 answer:
kipiarov [429]3 years ago
4 0

Answer:

See explanation below.

Step-by-step explanation:

a) c(0) = 10

Here, t = 0 and c(0) = 10

At 8 A.M., there are 10 customers.

b) c(6) = c(7)

6 hours after 8 am is 2pm

7 hours after 8 am is 3pm

They are equal. So it means

There are the same number of customers at 2pm and at 3pm

c)

c(k) = 0

There are no customers, k hours after 8 am

d)

c(4) > c(3)

4 hours after 8 am is 12pm

3 hours after 8 am is 11am

This means:

The number of customers at 12pm is greater than the number of customers at 11am

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Answer:

d) 135º

Step-by-step explanation:

Note that the angle DCU is the sum of the angles DCB and BCU. The angle DCB is 90º because A B C D is a square, then all its angles are equal to 90º.

After attaching B U C to A B C D, we obtain a trapezoid A U C D. Since A U C D has at least one pair of parallel sides, then AU should be parallel to CD, thus the angle CBU must be 90º.

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The given lines are intersecting at one point so we have one solution.

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