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sergejj [24]
3 years ago
14

A market researcher conducts a survey of residents in three neighborhoods. The residents are asked whether they prefer ice cream

or gelato.
The results, given as joint relative frequencies, are shown in the two-way table. What is the probability that a randomly selected resident of
Arnona will prefer ice cream? Round your answer to the nearest tenth of a percent.
Frogtown Trondale Arnona
Ice Cream
0.31
0.12
0.17
Gelato
0.15
0.16
0.09
Mathematics
1 answer:
Naya [18.7K]3 years ago
3 0

Answer: what’s the answer

Step-by-step explanation:

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The answers in my textbook show that using Soh Cah Toa is not right. Unless I'm doing it wrong. Can someone help me please?
Fiesta28 [93]

Answer:

(a) α = 60°, β = 30°

(b) α ≈ 67.4°, β ≈ 22.6°

Step-by-step explanation:

I'll do (a) and (b) as examples.  Make sure your calculator is set to degrees, not radians.

(a) For α, we're given the opposite and adjacent sides, so use tangent.

tangent = opposite / adjacent

tan α = √300 / 10

tan α = √3

α = 60°

Since angles of a triangle add up to 180°, we know that β = 30°.  But we can use tangent again to prove it:

tan β = 10 / √300

tan β = 1 / √3

tan β = √3 / 3

β = 30°

(b) For α, we're given the adjacent side and the hypotenuse.  So use cosine.

cos α = adjacent / hypotenuse

cos α = 15 / 39

cos α = 5 / 13

α ≈ 67.4°

Again, we know that β = 22.6°, but let's show it using trig.  We're given the opposite side and hypotenuse, so use sine:

sin β = 15 / 39

sin β = 5 / 13

β ≈ 22.6°

8 0
3 years ago
Find the value. please help!
ZanzabumX [31]
A= 2.5
b= 2
LM/ON= 15
LO/MN= 5
8 0
2 years ago
1. Coloreen la mitad de los triángulos de azul.
azamat
I don’t know guat your sayin my friend my bad
4 0
3 years ago
Brand X costs $2.70 for 10 ounces. Brand Y costs 4 cents more per ounces. What is the cost of 11 ounces of brand Y?
Ksju [112]
Well you have to first find the constant of Brand X which would be 2.70/10 = .27. Brand Y is .4 more so that would be .31 per ounce. So then .31 x 11 = 3.41. The cost of 11 ounces of brand Y is $3.41.
8 0
3 years ago
To solve the equation X - 62 = 123, you would ?
Ratling [72]
X-62=123
+62 +62
_________
x=185
you need to add a positive 62 from each side so -62+62=0 and 123+62=185
therefore, x=185
:Done! hope this helps!
6 0
3 years ago
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