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3 years ago

7

What number is 386 more than the sum of 345 and 425

1 answer:

Lyrx [107]3 years ago

6 0

I think it is 1156 because 345 + 425 = 770, and 770 + 386 = 1156

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Which two numbers on the number line have an absolute value of 1.25?

Yuri [45]

<span>Absolute value concerns the distance a value is from 0, without regard to the sign of the value. Positive and negative numbers both take a positive absolute value. In this example, the numbers -1.25 and 1.25 are both exactly 1.5 units from zero, so their absolute values are both 1.25.</span>

3 0

3 years ago

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The average gasoline price of one of the major oil companies in Europe has been $1.25 per liter. Recently, the company has under

umka2103 [35]

Answer:

1. Option A) Reject the null hypothesis

2. Option B) 0.0062

Step-by-step explanation:

We are given the following in the question:

1. Population mean, μ = $1.25 per liter

Sample mean, $\bar{x}$ = $1.20 per lite

Sample size, n = 49

Alpha, α = 0.05

Population standard deviation, σ = $0.14

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 1.25\text{ dollars per liter}\\H_A: \mu < 1.25\text{ dollars per liter}$

We use one-tailed z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{1.20 - 1.25}{\frac{0.14}{\sqrt{49}}}= -2.5$

Now, $z_{critical} \text{ at 0.05 level of significance } = -1.64$

Since,

$z_{stat} < z_{critical}$

We reject the null hypothesis and accept the alternate hypothesis.

Option A) Reject the null hypothesis

Thus, there is enough evidence to support the claim that efficiency measures have reduced the prices.

2. We can calculate the p value from the standard table.

P-value = 0.0062

Option B) 0.0062

4 0

3 years ago

A cubical water tank is 80 CM broad how many CC of water does it hold

Bogdan [553]

Answer:

I think: vol of h20 inside = side³ = (80cm)³ =512000 cm³

Please refer!

Step-by-step explanation:

I'm not sure but hope it helps.

7 0

3 years ago

a cylindrical barrel has a dimater of 19.875 inches. which of the following is the best estamet of the circumference of the barr

Bezzdna [24]

I a little much more than that

5 0

3 years ago

Plz help me asap plzzzzzz

BaLLatris [955]

Answer:

X= - 1/6

Step-by-step explanation:

Well its 16/7 = -8x

We can do a proportion over here

so 16/7 = -8x/1

Now just cross multiply to solve proportion

-56x=16

divide -56 to isolate x

x= 16/-56

Now simplify 16/-56

which is -1/6

So negative 1/6

3 0

3 years ago

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