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finlep [7]
2 years ago
13

Tracy has a cell phone plan that provides 250 free minutes each month for a flat rate of 29$. For any minutes over 250 tracy us

charged 0.35$ per minute. Which of the following picewise functions represents charges based on tracy’s cell phone plane?
Mathematics
1 answer:
iVinArrow [24]2 years ago
7 0

Answer:

Since Tracy is charged $29 for 250 free minutes so:

For x ≤ 250, f(x) = $29

tracy is charged an extra $0.35 per minute for calls over 250 minutes, so:

For x ≥ 250, f(x) = 29 + 0.35(x - 250)

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Answer: Remember that the tens place is two moves to the left of the decimal point (if it exists). To round to the nearest ten (nearest 10), we use the whole numbers place to determine whether the tens place rounds up or stays the same.

Solution steps:

Step 1: Locate and underline the tens place () and look to digit to the right (6):

36

Step 2: In this case, the digit to the right 6 is 5 or above. So, we add 1 to the tens place (). The digit(s) after the (6) are dropped. Thus, we get 40 as answer.

In short: 36 rounded to the nearest tens is 40.

Step-by-step explanation:

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<h3>The combined weight of a car and truck is given as the polynomial   P(W) = x³ + x² + 11 x + 300</h3>

Step-by-step explanation:

The weight of the car is given as:

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The weight of the truck is given as:

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Now, the combined weight of both vehicles is given as

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P(W)  = x² + 10 x  + 200 +  x³ +  x  + 100

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⇒ The combined weight of a car and truck is given as the polynomial P(W) = x³ + x² + 11 x + 300

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