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I don't know how to do this can someone explain it. - The water under a draw bridge was 15 feet deep at midnight. As the tide went out, the water depth decreased at the rate of 0.025 feet per minute. Write an equation that can be solved find t, the time in minutes it took the water depth to reach 13 feet. How many minutes does it take to reach that 13 foot depth?

Respuesta :

Answer:

Step-by-step explanation:

0.025X+13= 15

80 minutes to reach 13 foot

raphealnwobi

It took 80 minutes for the water to reach 13 foot depth.

A linear equation is given by:

y = mx + b

where y, x are variables, m is the rate of change, b is the initial vale of y (y intercept).

Let y represent the depth of the water after t minutes.

The water under a draw bridge was 15 feet deep at midnight. Hence b = 15 ft, also the water depth decreased at the rate of 0.025 feet per minute, hence m = -0.025. The equation becomes:

y = -0.025t + 15

The time taken to reach 13 feet is:

13 = -0.025t + 15

-0.025t = -2

t = 80 minutes

Therefore it took 80 minutes for the water to reach 13 foot depth.

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