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2 years ago

ANSWER THIS URGENTLY

Mathematics

1 answer:

neonofarm [45]2 years ago

8 0

I think B if not type 1/3 pi 6 squared and add 6.71 or something with the 6.71

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Identify the diameter of the disc. HELP ASAP!!

Hoochie [10]

Answer:

9 in

Step-by-step explanation:

The diameter of a circle is a chord or line that passes through the center point of a circle. It's like a radius, except the line extends to the other side

Hope this helps!

JoeyHill

7 0

3 years ago

If we wanted to create a new 90% confidence interval from a different sample for the proportion of those with a two on one date

slava [35]

Answer: 271

Step-by-step explanation:

The formula we use to find the sample size is given by :-

$n=p(1-p)(\dfrac{z_{\alpha/2}}{E})^2$

, where $z_{\alpha/2}$ is the two-tailed z-value for significance level of $(\alpha)$

p = prior estimation of the proportion

E = Margin of error.

If prior estimation of the proportion is unknown, then we take p= 0.5 , the formula becomes

$n=0.5(1-0.5)(\dfrac{z_{\alpha/2}}{E})^2$

$n=0.25(\dfrac{z_{\alpha/2}}{E})^2$

Given : Margin of error : E= 0.05

Confidence level = 90%

Significance level $\alpha=1-0.90=0.10$

Using z-value table , Two-tailed z-value for significance level of $0.10$

$z_{\alpha/2}=1.645$

Then, the required sample size would be :

$n=0.25(\dfrac{1.645}{0.05})^2$

Simplify,

$n=270.6025\approx271$

Hence, the required minimum sample size =271

3 0

3 years ago

Calculate:|a|−|b|+|c|, if a=−8; b=−5; c=1

Fynjy0 [20]

Answer:

The answer is 4.

Step-by-step explanation:

8 0

3 years ago

Read 2 more answers

The Ride-It Store rents bicycles. The cost is $8.50 for 1 hour, $13.65 for 2 hours, &18.80 for 3 hours, and &23.95 for 4

aniked [119]

So for each hour the price increases $5.15
so 4 hours = 23.95
5 hours = 23.95 + 5.15 = 29.10
6 hours = 29.10 + 5.15 = 34.25

8 0

2 years ago

Formula: Area of a parallelogram = base X height<br>I'm kind of confused.

Mademuasel [1]

I think in (a) it will be 12*7 = 84 cm^2
In (b) it will be 42:6= 7 so 7*6=42 cm
In (c) it will be 42,9:7,8= 5,5 so 7,8*55 = 42,9

6 0

2 years ago