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3 years ago

Find the area of the irregular figure. Round to the nearest hundredth.

Mathematics

2 answers:

Olegator [25]3 years ago

7 0

The answer is 137.5in^2

blondinia [14]3 years ago

5 0

Answer:

137.5 in^2

Step-by-step explanation:

So, this is basically a rectangle and two right-sides triangles.

First the rectangle: Formula is A=wl

Replace the Values: A = 14*7 98 in^2

Then we solve for the two right-sides triangles.

A= 1 /2a h= 1 /4 b ^2 sin (2 θ )

Top trinangle= A = 25.5 in^2 (height 7 in base 7 in)

Bottom Trinagle A = 14 in^2 (height 7 in base 4 in)

Add results:

98+25.5+14 = 137.5 in^2

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Directions for questions 4 & 5: We selected a random sample of 100 StatCrunchU students, 67 females and 33 males, and analyz

GaryK [48]

Answer:

The 95% confidence interval for the difference between means is (-2164.21, -299.13).

The lower limit on the confidence interval is -$2164.21.

The upper limit on the confidence interval is -$299.13.

Step-by-step explanation:

The sample data is:

Gender Mean Std. dev. n

Female 2577.75 1916.29 67

Male 3809.42 2379.47 33

We have to calculate a 95% confidence interval for the difference between means, with a T-model.

The sample 1, of size n1=67 has a mean of 2577.75 and a standard deviation of 1916.29.

The sample 2, of size n2=33 has a mean of 3809.42 and a standard deviation of 2379.47.

The difference between sample means is Md=-1231.67.

$M_d=M_1-M_2=2577.75-3809.42=-1231.67$

The estimated standard error of the difference between means is computed using the formula:

$s_{M_d}=\sqrt{\dfrac{\sigma_1^2}{n_1}+\dfrac{\sigma_2^2}{n_2}}=\sqrt{\dfrac{1916.29^2}{67}+\dfrac{2379.47^2}{33}}\\\\\\s_{M_d}=\sqrt{54808.468+171572.045}=\sqrt{226380.513}=475.795$

The t-value for a 95% confidence interval is t=1.96.

The margin of error (MOE) can be calculated as:

$MOE=t\cdot s_M=1.96 \cdot 475.795=932.54$

Then, the lower and upper bounds of the confidence interval are:

$LL=M_d-t \cdot s_{M_d} = -1231.67-932.54=-2164.21\\\\UL=M_d+t \cdot s_{M_d} = -1231.67+932.54=-299.13$

The 95% confidence interval for the difference between means is (-2164.21, -299.13).

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Tasya [4]

Answer:

Step-by-step explanation:

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rope price of length 45cm 25 cm and 81 cm have to be cut into same size pieces what is the smallest price length possible

Sergeeva-Olga [200]

= 2025

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For this, you divide the given lengths using the numbers that divides all through.

I have added an image to this answer. Go through it for more explanation

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2 years ago

2 sin^2(x) + 3sin(x) + 1 - 0 in radians

alexira [117]

This was a quadratic formula
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3 years ago

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NISA [10]

Answer:

Step-by-step explanation:

Using Pythagoras' identity in the right triangle

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3 years ago