Help with math, please! I need help with 3 questions!

Mathematics

1 answer:

pishuonlain [190]4 years ago

4 0

You have a mortgage payment of 1,248.90 month. Using proportions, what is the minimum amount you must have in realized income per month to keep your housing expenses in the acceptable range

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PLEASE HELP!!

Katena32 [7]

The formula for a regular polygon, which this one is, is A = 1/2 ap where a is the apothem and p is the perimeter. 20.8 * 7 = 145.6 which is the perimeter, so now just multiply by 21.6 and .5. 145.6 * 21.6 * .5 = 1572.48, or B above.

3 0

3 years ago

The gypsy moth is a serious threat to oak and aspen trees. A state agriculture department places traps throughout the state to d

k0ka [10]

Part A:

From the central limit theorem, since the number of samples is large enough (up to 30), the mean of the the mean of the average number of moths in 30 traps is 0.6.

Part B:

The standard deviation is given by the population deviation divided by the square root of the sample size.

$standard \ deviation= \frac{\sigma}{\sqrt{n}} = \frac{0.4}{\sqrt{30}} = \frac{0.4}{5.477} =0.073$

Part C:

The probability that an approximately normally distributed data with a mean, μ, and the standard deviation, σ, with a sample size of n is greater than a number, x, given by

$P(X\ \textgreater \ x)=1-P(X\ \textless \ x) \\ \\ =1-P\left(z\ \textless \ \frac{x-\mu}{\sigma/\sqrt{n}} \right)$

Thus, given that the mean is 0.6 and the standard deviation is 0.4, the probability that <span>the average number of moths in 30 traps is greater than 0.7</span> given by:

$P(X\ \textgreater \ 0.7)=1-P(X\ \textless \ 0.7) \\ \\ =1-P\left(z\ \textless \ \frac{0.7-0.6}{0.073} \right)=1-P(z\ \textless \ 1.369) \\ \\ =1-0.91455=\bold{0.0855}$

7 0

4 years ago

The scale below represents which equations or inequality?

77julia77 [94]

Answer:

Step-by-step explanation:

the scale is balanced so its equal

4 0

3 years ago

Pls explain how to do this

8090 [49]

Answer:

3 1/12 miles

Step-by-step explanation:

$6\frac{3}{4} -3\frac{2}{3} \\\\=\frac{27}{4} -\frac{11}{3}\\\\ =\frac{81}{12} -\frac{44}{12} \\\\=\frac{37}{12}\\\\=3\frac{1}{12}$

Make them into mixed fractions and then find the least common denominator (12). solve.

5 0

3 years ago

What is the slope of the line with equation y-3=-1/2(x-2)?

dezoksy [38]

Answer:

5.9(86)

Step-by-step explanation:

5 0

3 years ago