Answer:
9.3 or 18.75
Step-by-step explanation:
i did the math let me know if helpful???
brainliest
Answer:
Probability that, of the questions studied, all three were the test questions selected by the professor is 0.05
Step-by-step explanation:
Total question gives by teacher = 6
A student has time to study for only three of these six questions.
We are supposed to find the probability that, of the questions studied, all three were the test questions selected by the professor?
So, Probability that, of the questions studied, all three were the test questions selected by the professor = ![\frac{^3C_3}{^6C_3}](https://tex.z-dn.net/?f=%5Cfrac%7B%5E3C_3%7D%7B%5E6C_3%7D)
= ![\frac{\frac{3!}{3!(3-3)!}}{\frac{6!}{3!(6-3)!}}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Cfrac%7B3%21%7D%7B3%21%283-3%29%21%7D%7D%7B%5Cfrac%7B6%21%7D%7B3%21%286-3%29%21%7D%7D)
= ![0.05](https://tex.z-dn.net/?f=0.05)
Hence Probability that, of the questions studied, all three were the test questions selected by the professor is 0.05
Answer:
x = 25.734083
![x \approx 25.734](https://tex.z-dn.net/?f=x%20%5Capprox%2025.734)
Step-by-step explanation:
<u>Trigonometric Ratios</u>
The ratios of the sides of a right triangle are called trigonometric ratios. There are six trigonometric ratios, sine, cosine, tangent, cosecant, secant, and cotangent.
The longest side of the triangle is called the hypotenuse and the other two sides are the legs.
Selecting any of the acute angles as a reference, it has an adjacent side and an opposite side. The trigonometric ratios are defined upon those sides.
Note we are given an angle of 25°. The opposite side is 12 and the adjacent side is x. We need to relate those sides with a trig function (the tangent ratio)
Tangent Ratio:
![\displaystyle \tan\theta=\frac{\text{opposite leg}}{\text{adjacent leg}}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Ctan%5Ctheta%3D%5Cfrac%7B%5Ctext%7Bopposite%20leg%7D%7D%7B%5Ctext%7Badjacent%20leg%7D%7D)
Substituting:
![\displaystyle \tan 25^\circ=\frac{12}{x}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Ctan%2025%5E%5Ccirc%3D%5Cfrac%7B12%7D%7Bx%7D)
Solving for x:
![\displaystyle x=\frac{12}{\tan 25^\circ}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20x%3D%5Cfrac%7B12%7D%7B%5Ctan%2025%5E%5Ccirc%7D)
Calculating:
![\displaystyle x=\frac{12}{0.466307}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20x%3D%5Cfrac%7B12%7D%7B0.466307%7D)
x = 25.734083
Round to 3 decimals:
![\mathbf{x \approx 25.734}](https://tex.z-dn.net/?f=%5Cmathbf%7Bx%20%5Capprox%2025.734%7D)
The first one seems like the best answer to me