The answer is 18 you’re welcome
Answer:
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<h2>4 hrs</h2>
Step-by-step explanation:
Singer A's pay can be modelled using an expression which is linear in the number of hours she serves.
![P_{a}(h)=45+10h](https://tex.z-dn.net/?f=P_%7Ba%7D%28h%29%3D45%2B10h)
Singer B's pay can also be modelled using an expression which is linear in the number of hours she serves.
![P_{b}(h)=65+5h](https://tex.z-dn.net/?f=P_%7Bb%7D%28h%29%3D65%2B5h)
Both singers charge same amount when ![P_{b}(h)=P_{a}(h)](https://tex.z-dn.net/?f=P_%7Bb%7D%28h%29%3DP_%7Ba%7D%28h%29)
![45+10h=65+5h\\5h=20\\h=4](https://tex.z-dn.net/?f=45%2B10h%3D65%2B5h%5C%5C5h%3D20%5C%5Ch%3D4)
∴ Both singers charge same amount at 4 hrs of service
The sine ratio of angle θ is 4/5 because sin is the ratio to opposite to the hypotenuse.
<h3>What is a right-angle triangle?</h3>
It is a triangle in which one of the angles is 90 degrees and the other two are sharp angles. The sides of a right-angled triangle are known as the hypotenuse, perpendicular, and base.
We have a right angle triangle showing in a picture.
As we know, the sin is the ratio to opposite to the hypotenuse.
Sinθ = 4/5
Thus, the sine ratio of angle θ is 4/5 because sin is the ratio to opposite to the hypotenuse.
Learn more about the right angle triangle here:
brainly.com/question/3770177
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Power of 10. Times everything by 10. So example- 10x10 is 100