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Pie
3 years ago
15

Please answer asap thanks

Mathematics
1 answer:
mylen [45]3 years ago
8 0

its a or c not to sure

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3 years ago
Help ME pls<br><br><br><br>.............
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Answer:

not sure how this is math

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A 15-inch candle is lit and burns at a constant rate of 1.2 inches per hour. Let t represent the number of hours since the candl
sergejj [24]

Answer:

f(t) = 15 -1.2t

0 \le t \le 12.5

15 \ge f(t)t \ge 0

The length of the candle (in inches) 3.6 hours after it was lit is 0.95 inches

Step-by-step explanation:

Given

a = 15 ---- candle length

r =- 1.2 --- rate (it is negative because the candle length reduces)

Solving (a): The function, f(t)

This is calculated as:

f(t) = a + rt

So, we have:

f(t) = 15 + -1.2 * t

f(t) = 15 -1.2t

Solving (b): The domain

The domain, in this case, represents time from 0 till the candle burns out.

Set f(t) = 0 to calculate the time the candle burns out

f(t) = 15 -1.2t

0 = 15 - 1.2t

Collect like terms.

1.2t = 15

Solve for t

t = 15/1,2

t = 12.5

Hence, the domain is: 0 \le t \le 12.5

Solving (c): The range

The domain, in this case, represents the candle height from 15 till the candle burns out (0 inches)

Hence, the range is: 15 \ge f(t)t \ge 0

Solving (d): f(t) = 3.6

Recall that:f(t) = 15 -1.2t

Sp, we have

15 - 1.2t - 3.6

Collect like terms

12t =15 -3.6

12t =11.4

Divide by 12

t =0.95

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