2 years ago

Please help me look at the photo

Mathematics

1 answer:

slavikrds [6]2 years ago

5 0

Answer:

I think the answers are E = 4 ¼ F = -6 ¼ D = -3 ¼

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Consider the following hypothesis test: H 0: 20 H a: < 20 A sample of 50 provided a sample mean of 19.4. The population stand

goblinko [34]

Answer: p-value is 0.016.

Step-by-step explanation:

Since we have given that

$H_0:\mu=20\\\\H_a:\mu$

Sample mean = 19.4

Sample size n = 50

Standard deviation = 2

We need to find the test statistic value which is given by

$z=\dfrac{\bar{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}\\\\\\z=\dfrac{19.4-20}{\dfrac{2}{\sqrt{50}}}\\\\\\z=\dfrac{-0.6}{0.28}\\\\z=-2.14$

p-value is given by

$P(Z>Z_{critical})\\\\=P(Z>-2.14)\\\\=0.016$

Hence, p-value is 0.016.

8 0

3 years ago

The sum of two numbers is 35. There times the larger number is the same as 4 times the smaller number. Find the larger number. W

marshall27 [118]

35 = x + 4 -4
31 = x

4 0

3 years ago

Simplify<br> 21x^6 y^5<br> 14x^2y^9

PIT_PIT [208]

Answer:

$\frac{3x^{4} }{2y^{4} }$

Step-by-step explanation:

Factor out 7 from top and bottom :

$\frac{7(3x^6y^5)}{7(2x^2y^9)}$

Divide top and bottom by 7 :

$\frac{3x^6y^5}{2x^2y^9}$

Simplify :

$\frac{x^6}{x^4}=x^{2}$

Simplify :

$\frac{y^5}{y^9} = y^{-4} = \frac{1}{y^{4} }$

Collect everything together :

$\frac{3x^{4} }{2y^{4} }$

Hope this helped and have a good day

5 0

2 years ago

0.0025 cm << in scientific notation

Leno4ka [110]

2.5 X 10^-3 is the scientific notation for 0.0025

7 0

3 years ago

Each tree in the orchard had exactly 118 apples on it. The number of apples in the whole orchard was 2,242. How many apple trees

sergejj [24]

118×2242
= 264,556
this is the answer

7 0

3 years ago

Read 2 more answers