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3 years ago

If the diameter of a circle is 20ft. What is the circumference?

Mathematics

2 answers:

Naily [24]3 years ago

5 0

Answer:

Step-by-step explanation:

in the picture radius=20 ft

circumference C=2π r=2×3.14×20=125.60 sq. ft.

Contact [7]3 years ago

4 0

Answer:

The circumference of this circle would be:

<em><u>You can round this down however you would like. Hope this helps :)</u></em>

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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

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3 years ago

A bakery has 4 trays with 16 muffins on each tray. The bakery has 3 trays of cupcakes with 24cupcakes on each tray. If 15cupcake

grandymaker [24]

Well there weren't any muffins sold so 16x4=64, you have 64 muffins. Then you have 3x24 cupcakes so thats 72 muffins and if you sold 15 of them 72-15 that gives you 57. Leaving you with 64 muffins and 57 cupcakes.

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4 years ago

Find the LCM of 200 and 240.

natka813 [3]

Answer:1,200

Step-by-step explanation:

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4 years ago

A landscaper is designing a flower garden in the shape of a trapezoid. She wants the shorter base to be 3 yards greater than the

Kitty [74]

The equation is to be given, judging by the tone problem given but apparently it's not given. The equation can be derived from the problem. The area of a trapezoid is given by the equation $A = \frac{(a+b)}{2} h$ . Also, given that a, is the longer side, then a = h+7 and b (shorter side) = h+3 and h is the height. the equation is then $A = \frac{(h+3)(h+7)}{2}h = 225$ . Solving this quadratic equation, h is 4.84.

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3 years ago

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Please help me quiz

nata0808 [166]

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3 years ago