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3 years ago

Help me please!!!!!!

Mathematics

1 answer:

lidiya [134]3 years ago

7 0

Remember solving inequalities is setting up two smaller inequalities one positive one negative. Also, when you divide or multiply by a negative number to solve for x the inequality changes over.

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On level ground, a vertical rod 12 feet tall casts a shadow 4 feet long, and at the same time a nearby vertical flagpole casts a

Savatey [412]

$\frac{Actual}{Shadow}$ = $\frac{Actual}{Shadow}$
$\frac{12}{4}$ = $\frac{Actual₂}{12}$
Actual = 36 feet

7 0

3 years ago

Read 2 more answers

To estimate a population mean, the sample size needed to provide a margin of error of 3 or less with a 95% confidence when the p

Over [174]

Answer:

The minimum sample needed to provide a margin of error of 3 or less is 52.

Step-by-step explanation:

The confidence interval for population mean (μ) is:

$\bar x\pm z_{\alpha /2}\frac{\sigma}{\sqrt{n}}$

The margin of error is:

$MOE= z_{\alpha /2}\frac{\sigma}{\sqrt{n}}$

Given:

MOE = 3

σ = 11

The critical value for 95% confidence interval is: $z_{\alpha /2}=1.96$

**Use the z-table for critical values.

Compute the sample size (n) as follows:

$MOE= z_{\alpha /2}\frac{\sigma}{\sqrt{n}}\\3=1.96\times \frac{11}{\sqrt{n}}\\n=(\frac{1.96\times11}{3} )^{2}\\=51.65\\\approx52$

Thus, the minimum sample needed to provide a margin of error of 3 or less is 52.

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3 years ago

How does the graph move if the h is positive (for instance, h is 4): f(x) =(x-h)2

Dvinal [7]

Answer:

it moves graph left

Step-by-step explanation:

h=left and right

k=up and down

7 0

2 years ago

8 1/8 i need help please

deff fn [24]

Answer:

V=a^3

V=8 1/2^3

V=614.125

Step-by-step explanation:

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2 years ago

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What's sixty nine thousand one hundred eight written in standred form

Vadim26 [7]

The answer is 69,108

3 0

3 years ago