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David is paid a salary of $1850 per month. He is also paid time and a half for work in excess of 40 hours a week. He worked 62 h
1 answer:
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Answer:
<h3><em>D. 880 = 45d + 70; 18 days.</em></h3>Step-by-step explanation:
We are given fixed monthly charge = $70.
The cost of preschool per day = $45.
Number of days = d.
Total cost of d days = cost per day × number of days + fixed monthly charge.
Therefore, we get equation
880 = 45×d+70
<h3>880 = 45d +70.</h3>Now, we need to solve the equation for d.
Subtracting 70 from both sides, we get
880-70 = 45d +70-70
810=45d
Dividing both sides by 45, we get
18=d.
Therefore,<em> 18 days Barry attended preschool last month.</em>
<em>Therefore, correct option is D option.</em>
<h3><em>D. 880 = 45d + 70; 18 days.</em></h3>Answer:
Step-by-step explanation:
Using the slope formula, you can form this equation! The slope of any equation would replace the m, and the y intercept would replace b!
I added in the slope formula at the bottom, just in case, so you'll see what I mean!
I hope this helps, and I explained enough! Have a great day c:
An exponential function is a function defined by y = ab^x, where a represents the initial value, and b represents the rate
<h3>(a) The factor at which the medicine decreased, in 1.5 hour</h3>From the graph, we have the following ordered pairs
(x,y) = (0,270) and (1.5,80)
Given that:
At point (0,270), we have:
At point (1.5,80), we have:
Substitute 270 for a
Divide both sides by 270
Take 1.5th root of both sides
Hence, the medicine decrease in the hour and half at a factor of 0.44
<h3>(b) The factor at which the medicine decreased in the first half hour, and the first hour</h3>In (a), we have:
The decay factor (b) to be 0.44
This represents the factor at which the medicine decreased throughout.
Hence, the medicine decrease in the first half hour, and the first hour at a factor of 0.44
<h3>(c) The exponential equation</h3>In (a), we have:
So, the exponential equation is:
In terms of m and h, we have:
Hence, the equation relating m to h is
Read more about exponential equations at: