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3 years ago

The length of a rectangle is 3 inches more than its width. The perimeter of the rectangle is 34 inches

1 answer:

3 0

Perimeter p means adding up the four sides of a rectangle.

Step 2. Let w equal the width.

Step 3. Let w+3 equal the length.

Step 4. Then you'll have this really confusing equation: P=w+w+w+3+w+3=4w+6=30

And it will give you w= 6

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A study was recently conducted to estimate the mean cholesterol for adult males over the age of 55 years. From a random sample o

Komok [63]

Answer: Correct critical value = 2.2622

Step-by-step explanation:

Confidence interval for population mean when population standard deviation is unknown:

$\overline{x}\pm t_{\alpha/2}\dfrac{s}{\sqrt{n}}$ , where $\overline{x}$ = sample mean, n= sample size, s= sample standard deviation, $t_{\alpha/2}$ = two-tailed t value.

As per given: n= 10

degree of freedom : df = n-1=9

$\overline{x}=242.6\\\\s=73.33\\\\\alpha=5\%=0.05$

Critical t-value : $t_{\alpha/2,df}=t_{0.05/2,9}=t_{0.025,9}=2.2622$

So, the 95 percent confidence interval estimate for the mean :

$242.6\pm (2.2622)\dfrac{73.33}{\sqrt{10}}\\\\=242.6\pm (2.2622)(23.19)\\\\\approx242.6\pm52.46\\\\=(242.6-52.46,\ 242.6+52.46)\\\\=(190.14,\ 295.06)$

The 95 percent confidence interval estimate for the mean:(190.14, 295.06)

8 0

3 years ago

-12 -24 which one is greater or less than

Simora [160]

Answer:

-12 > -24

Step-by-step explanation:

When the numbers are negative the number that is closer to zero is the greatest

7 0

3 years ago

Read 2 more answers

I will give BRAINLIEST to whoever is CORRECT

8090 [49]

I believe the answer could be

h = -16t^2 + 32t + 12
---------------------------
t

7 0

3 years ago

12km Radius= Diameter:

vovikov84 [41]

Answer: 24km

Explanation: radius is half of the diameter so we just multiply by 2 to get a diameter

7 0

3 years ago

N a right triangle ΔABC, the length of leg AC = 5 ft and the hypotenuse AB = 13 ft. Find:

kirza4 [7]

First find the length of leg BC by using the Pythagorean theorem BC=132+52=12 ft if we find the midpoint of BC which is 6 ft we find where the angle bisector would touch the BC. From there we construct another triangle ANC where AC is equal to 5 ft and NC is equal to 6 ft where we can again use the Pythagorean theorem to find the length of the hypotenuse which is the angle bisector AN=Angle Bisector=62+52=7.8102 ft.

5 0

2 years ago