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erica [24]
3 years ago
14

Can someone help and explain

Mathematics
1 answer:
BaLLatris [955]3 years ago
5 0

Answer:

∠ A ≈ 43.1°

Step-by-step explanation:

Using the Sine rule in Δ ABC , that is

\frac{a}{sinA} = \frac{c}{sinC} , substitute values

\frac{20}{sinA} = \frac{29}{sin82} ( cross- multiply )

29 × sinA = 20 × sin82 ( divide both sides by 29 )

sinA = \frac{20sin82}{29} , thus

∠ A = sin^{-1} (\frac{20sin82}{29} ) ≈ 43.1° ( to 1 dec. place )

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Data were collected on random specimens of Yellowfin tuna from 1991 and 2010. For the sample of 231 specimens of Yellowfin tuna,
Molodets [167]

Answer:

95% confidence interval: (0.325 ,0.383)

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 231

Sample mean = 0.354 ppm

Sample standard deviation = 0.231 ppm

95% confidence interval:

\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}  

Putting the values, we get,  

t_{critical}\text{ at degree of freedom 4 and}~\alpha_{0.01} = \pm 1.97  

0.354 \pm 1.97(\dfrac{0.231}{\sqrt{231}} ) = 0.354 \pm 0.029 = (0.325 ,0.383)  

6 0
3 years ago
Can someone help me with credit recovery
Sindrei [870]

Answer:

Credit recovery is a term used to describe a wide variety of educational strategies and programs that give high school students who have failed a class the opportunity to redo coursework or retake a course through alternate means—and thereby avoid failure and earn academic credit.

Step-by-step explanation:

I'm not sure if this help but if it does good luck with it.

7 0
3 years ago
I need help! Please! Geometry! I don't know what I'm doing! ​
Ber [7]
Hi! collinear means on the same line, while coplanar means on the same plane! here’s what i got for these questions:

2 - false

4 - i’m not too sure on this one, but i believe it’s true!

6 - false

7 - true

try to check the answers and make sure they’re true before submitting! hope this helped!:)
8 0
3 years ago
Find the missing side length.
andrew11 [14]
So first of all you know that one side is 14cm and the other side is 6cm

What you would do is: 14-6=???







Your answer should be: 8cm
5 0
3 years ago
I'm not really 100% sure on how to do this??
Cloud [144]
XPY is the circumference minus XY

the angle of arc XY is 90 degrees

a full revolution of a circle is 360 degrees

the distance XY is 1/4 of the circumference of the circle

the circumference of a circle is C=2 pi r

r is 10m

the circumference is 20 pi

1/4 of 20 is 5

the distance of arc XY is 5 pi

20pi - 5 pi = 15 pi
7 0
3 years ago
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