Question

question
when khloe left her house in the morning, her cell phone battery was partially charged. the charge remaining in khloes battery, as a percentage, can be modeled by the equation b = 45 - 4.5t, where t is the number of hours since khloe left her house. what is the x - intercept of the equation and what is its interpretation in the context of the problem?
answer attempt 2 out of 2
the x - intercept of the function is i which represents

Explanation:

Step1: Recall x - intercept definition

The x - intercept is found by setting \(B = 0\) (since on the x - axis, the value of the dependent variable is 0). So we set up the equation \(0=45 - 4.5t\).

Step2: Solve for t

First, add \(4.5t\) to both sides of the equation: \(4.5t=45\). Then divide both sides by \(4.5\): \(t=\frac{45}{4.5}=10\).

Answer:

The \(x\) - intercept of the function is \(10\) which represents the number of hours after Khloe left her house when her cell - phone battery is completely drained (has 0% charge remaining).