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2 years ago

Pls help will mark brainliest.

Mathematics

2 answers:

Semenov [28]2 years ago

8 0

Answer:

Step-by-step explanation:

fomenos2 years ago

5 0

Answer: B

Step-by-step explanation: I’m pretty sure and I can’t comment right now

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suppose the circumference of a crop circle is 150.7968 hectometers (hm) what's the radius of the circle? (usett=3.1416)

gulaghasi [49]

Answer:

The radius of the circle is $24\ hm$

Step-by-step explanation:

we know that

The circumference of a circle is equal to

$C=2\pi r$

In this problem we have

$C=150.7968\ hm$

$\pi=3.1416$

substitute and solve for r

$150.7968=2(3.1416)r$

$r=150.7968/(2(3.1416))=24\ hm$

7 0

3 years ago

Read 2 more answers

Solve the equations for y.<br> 1) x+y=2<br> 2) 4x+2y=8<br> 3) y-3=0

umka21 [38]

Answer:

Y=3

Step-by-step explanation:

-1= 1/2

1/2=-1

x=-1

y=3

Hope this helps!

5 0

3 years ago

Four times a first number decreased by a second number is - 14. The first

mel-nik [20]

Answer:

f = -5, s = -6

Step-by-step explanation:

F= first number

S= second number

4f - s = -14

f + 3s = -23

3(4f - s = -14)

12f - 3s = -42

+ f + 3s = -23

13f = -65

————

f = -5

4f - s = -14

4(-5) - s = -14

-20 - s = -14

+20 +20

-s = 6

———

-1

s = -6

3 0

3 years ago

HELP RIGHT NOW AND ILL GIVE BRAINLY IF CORRECT

Stella [2.4K]

Answer:

-9

Step-by-step explanation:

$3^{-36}$ = $27^{-12}$

7 0

3 years ago

Suppose 232subjects are treated with a drug that is used to treat pain and 50of them developed nausea. Use a 0.01significance le

Margarita [4]

Answer:

The correct option is B

$t = 0.6093$

$p-value = 0.27116$

The correct option is D

Step-by-step explanation:

From the question we are told that

The sample size is $n = 232$

The number that developed nausea is X = 50

The population proportion is p = 0.20

The null hypothesis is $H_o : p = 0.20$

The alternative hypothesis is $H_a : p > 0.20$

Generally the sample proportion is mathematically represented as

$\r p = \frac{50}{232}$

$\r p = 0.216$

Generally the test statistics is mathematically represented as

=> $t = \frac{\r p - p }{ \sqrt{ \frac{p(1- p )}{n} } }$

=> $t = \frac{ 0.216 - 0.20 }{ \sqrt{ \frac{ 0.20 (1- 0.20 )}{ 232} } }$

=> $t = 0.6093$

The p-value obtained from the z-table is

$p-value = P(Z > 0.6093) = 0.27116$

Given that the $p-value > \alpha$ then we fail to reject the null hypothesis

5 0

3 years ago