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3 years ago

15

Twelve students tried out for the cheerleading squad. Three students were selected. What is the ratio of students selected to th

ose trying out?
A.
1:4
B.
3:1
C.
1:3
D.
4:1

2 answers:

dmitriy555 [2]3 years ago

4 0

Answer:

1:4 I'm not sure though

zimovet [89]3 years ago

4 0

Answer:14

Step-by-step explanation:

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How do you solve this problem

Kryger [21]

Answer:

$sin(A) = \frac{21}{{29} }$

$cos(A)=\frac{20}{29 }$

$tan(A)=\frac{21}{20}$

$sin(C) = \frac{20}{{29} }$

$cos(C)=\frac{21}{29 }$

$tan(C)=\frac{20}{21}$

Step-by-step explanation:

So first we need to make sure we know the trig identities to solve this problem.

$sin(\alpha )=\frac{opposite}{hypotenuse}$
$cos(\alpha )=\frac{adjacent}{hypotenuse}$
$tan(\alpha )=\frac{opposite}{adjacent}$

Here we only have two legs of the triangle, so we will need to use the Pythagorean Theorem a² + b² = c² to solve for the missing leg, the hypotenuse in this case.

Solving for the hypotenuse, c, we get $c = \sqrt{a^{2} +b^{2} }$
Here a = 20 and b = 21, so plugging in these values to the equation we get: $c= \sqrt{(20)^{2}+(21)^{2} } =\sqrt{400+441} =\sqrt{841}=29$

Now we can use the trig identities to figure out the missing values for the problem

$sin(A) = \frac{21}{{29} }$
$cos(A)=\frac{20}{29 }$
$tan(A)=\frac{21}{20}$
$sin(C) = \frac{20}{{29} }$
$cos(C)=\frac{21}{29 }$
$tan(C)=\frac{20}{21}$

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First find out what 40% of 200 is
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then find out what 1/3 of 150 is
divide 150 by three, which is 50
if it was 2/3 instead of 1/3, you would multiply 50 by 2

40% of 200 is greater

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