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Nina [5.8K]
2 years ago
14

Please help me with this question❤️

Mathematics
1 answer:
bija089 [108]2 years ago
3 0

Answer:

2/4 = 0.5

0.578

Step-by-step explanation:

so sin(π/4) is √2/2 squaring this gets your first answer

second answer is just plug and chug in a calculator

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A teacher claims that the proportion of students expected to pass an exam is greater than 80%. To test this claim, the teacher a
erica [24]

Answer:

z=-1.591

Step-by-step explanation:

Null Hypotheses,

H_0 : p=0.8\\H_a: p>0.80

So we use z-test for one population proportion (right-tailed test)

According to this informaton, we defined that

\alpha=0.05

z_c=1.64 (critical value)

So our Rejection region is R={z:z>1.64}

z=\frac{\bar{p}-p_0}{\sqrt{p_0(1-p_0)/n}} = \frac{0.755-0.8}{\sqrt{0.8(1-0.8)/200}}=-1.591

Not rejection.

6 0
2 years ago
What is the value of p+9 when p=16​
Tasya [4]

Answer:

25 :)

Step-by-step explanation:

well, if it's p+9 and you know that p=16 then you plug 16 in for p so the equation will be 16+9 and then you solve from there which is 25

4 0
2 years ago
Question 20 need an answerw
max2010maxim [7]
Which one is question 20??
8 0
3 years ago
Please helpp, thank youuu.
Mariulka [41]

Answer:

16ft

Step-by-step explanation:

use pythagreom thereom

12^2+b^2=20^2 solve

144+b^2=400

b^2= 256 square it

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4 0
2 years ago
Read 2 more answers
A positive number with an absolute value less than 5.
Goryan [66]

Answer:

3 I think.

Step-by-step explanation:

it's positive and it's also an absolute

4 0
2 years ago
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