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3 years ago

13

Help with this question, please!!

2 answers:

enyata [817]3 years ago

8 0

Answer:

Last answer

4.09 π

Step-by-step explanation:

Assuming CD and AB are straight lines and P is the center of the circle,

∠BPD = ∠CPA = 92°

r = 8 in

Minor Arc Length BD,

= (92/360) * 2πr

= (92/360) * 2π(8)

= 4.09 π

Flura [38]3 years ago

6 0

Answer:

12.85 inches

Step-by-step explanation:

Angle ACP = Angle DPB = 92 degrees

because they are vertical angles

We are finding arc length, which is circumference

C = 2* pi *r

but we are only find 92 degrees of the 360 in a circle

C = 2 * pi * r * 92/360

= 2 * pi *8 *92/360

= 4.09 pi inches

= 12.84562329

= 12.85 inches

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2/3 + 3/4 + 4/2. If a fraction appears in your answer, it should be in simplified form.

V125BC [204]

We must first make each fraction have a common denominator, this will be 12
2/3 * 4/4 = 8/12
3/4 * 3/3 = 9/12
4/2 * 6/6 = 24/12
we can then add the numerators of each fraction
8 + 9 + 24 = 41
so our answer is 41/12
we can not simplify any further and thus get
41/12

5 0

3 years ago

Determine where the PHD Mathematicians live.

Pavlova-9 [17]

Answer:

the answer to A,B,C

Step-by-step explanation:

all the points are on the graph

all answers

b) slope -1

intercept 1

c)(x+3)(x-1)

intercepts (-3,0),(1,0)

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6 0

3 years ago

Leah sent 574 text messages last week. Write and solve an equation to find, on average, how many messages she sent each day?

Korvikt [17]

I’ve attached a photo of the workings but the answer is 82

3 0

3 years ago

Use the null hypothesis H0 : μ = 98.6, alternative hypothesis Ha: μ < 98.6, and level of significance α = 0.05. 98 99.6 97.8

andrezito [222]

Answer:

The t-score is -1.8432

Step-by-step explanation:

We are given the following in the question:

98, 99.6, 97.8, 97.6, 98.7, 98.4, 98.9, 97.1, 99.2, 97.4, 99.1, 96.9, 98.8, 99.9, 96.8, 97, 98.7, 97.6, 98.7, 98.2

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{1964.4}{20} = 98.22$

Sum of squares of differences = 16.152

$s = \sqrt{\dfrac{16.152}{49}} = 0.922$

Population mean, μ = 98.6

Sample mean, $\bar{x}$ = 98.22

Sample size, n = 20

Sample standard deviation, s = 0.922

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 98.6\\H_A: \mu < 98.6$

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{98.22 - 98.6}{\frac{0.922}{\sqrt{20}} } = -1.8432$

The t-score is -1.8432

7 0

3 years ago

Quan điểm quản lý của trường phái đưc trị

mario62 [17]

.・。.・゜✭・Srry but which language is this!?

7 0

3 years ago