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3 years ago

I will give brainliest if correct !!

Mathematics

2 answers:

Elden [556K]3 years ago

6 0

I got 45 also. I will give you the steps if you want them, just let me know in the comments. Have a great day!

inn [45]3 years ago

3 0

Answer:

Step-by-step explanation:

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The height of a triangular flower garden is 6 feet more than the length of the base. If the area of the garden is 8 square feet,

Neko [114]

From the text you can derive the following equations:

(1) A = bh/2 = 8
(2) and h = b+6

Fill in h in (1):

b(b+6)/2 = 8 => b^2 + 6b = 16 with the quadratic formula or simply trying some values for b you can find b=2, so h=8.

5 0

4 years ago

Read 2 more answers

A. 5x10 to the third power

tatiyna

Answer:

5000

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Able

olasank [31]

Answer:

1/4

Step-by-step explanation:

.5/2=.25=1/4

4 0

3 years ago

it takes Diego 1/24 of an hour to complete a lap on a circular bike track. The track is 1/3 mile long. What is Diego's bike spee

Klio2033 [76]

Answer:

Step-by-step explanation:

3 0

3 years ago

A 99% confidence interval (in inches) for the mean height of a population is 65.7 < μ < 67.3. This result is based on a sa

Wittaler [7]

Answer:

$66.5 -1.976* 0.3065= 65.89$

$66.5 +1.976* 0.3065= 67.11$

And the 95% confidence interval would be givne by (65.89; 67.11)

Step-by-step explanation:

For this case we have a 99% confidence interval for the true mean hegiht givne by:

$65.7 \leq \mu \leq 67.3$

And we can begin finding the mean with this formula:

$\bar X= \frac{65.7 +67.3}{2}= 66.5$

Now we can estimate the margin of error:

$ME = \frac{67.3-65.7}{2}= 0.8$

The sample size for this case is $n = 144$ then the degrees of freedom are given by:

$df = n-1= 144-1=143$

And then we can find a critical value for a 99% of confidence and 143 degrees of freedom using a significance level of 0.01 and we got:

$t_{\alpha/2}= 2.61$

Then the standard error is given by:

$SE = \frac{ME}{t_{\alpha/2}}= \frac{0.8}{2.61}= 0.3065$

Now we can find the other critical value for 95% of confidence and we got:

$t_{\alpha/2}= 1.976$

And the new confidence interval would be given by:

$66.5 -1.976* 0.3065= 65.89$

$66.5 +1.976* 0.3065= 67.11$

And the 95% confidence interval would be givne by (65.89; 67.11)

3 0

3 years ago