Identify the sampling technique used. Every 17th person in line to buy tickets to a concert is asked his or her age.
1 answer:
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ANSWER
C. x=7
EXPLANATION
The given exponential equation is
We rewrite the right hand side as 3 raised to exponent 2.
Observe that the base of both sides of the equation are equal.
We now equate the exponents.
Solve for x,
The correct choice is C.
C. x=7
EXPLANATION
The given exponential equation is
We rewrite the right hand side as 3 raised to exponent 2.
Observe that the base of both sides of the equation are equal.
We now equate the exponents.
Solve for x,
The correct choice is C.
The correct measurements of the surveyors movement from all the options are; m∠b = 15° and h ≈ 31.28 ft
<h3>What are the correct elevation measurements?</h3>
From the image attached, we see that;
A surveyor found the angle of elevation from the ground to the top from a point = 33°
Now, the surveyor moves 20 ft towards the building and the angle of elevation becomes 48°. This means that ∠A and 48° are supplementary to each other.
Thus;
∠A + 48° = 180°
∠A = 180 - 48
∠A = 132°
From sum of angles in a triangle;
∠B + 33° + 132° = 180°
∠B = 180 - 165°
∠B = 15°
Using sine rule, we know that;
sin 33/C = sin B/20
Thus;
sin 33/C = sin 15/20
Solving for C gives;
C = 42.22
From trigonometric ratios, h/c = sin 48
h = 42.22 sin 48
h = 31.28 ft
Read more about elevations at; brainly.com/question/10254887
