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3 years ago

What is the adventure of buying a magnetic bulletin board?

1 answer:

max2010maxim [7]3 years ago

3 0

Measure and compare pencil lengths to the nearest and of an inch, and analyze the data through line plots. I should measure my pencil and see which half-inch or whole-inch mark is closest to the length of my strip

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An airliner maintaining a constant elevation of 2 miles passes over an airport at noon traveling 500 mi/hr due west. At 1:00 PM,

butalik [34]

Answer:

$\frac{ds}{dt}\approx 743.303\,\frac{mi}{h}$

Step-by-step explanation:

Let suppose that airliners travel at constant speed. The equations for travelled distance of each airplane with respect to origin are respectively:

First airplane

$r_{A} = 500\,\frac{mi}{h}\cdot t\\r_{B} = 550\,\frac{mi}{h}\cdot t$

Where t is the time measured in hours.

Since north and west are perpendicular to each other, the staight distance between airliners can modelled by means of the Pythagorean Theorem:

$s=\sqrt{r_{A}^{2}+r_{B}^{2}}$

Rate of change of such distance can be found by the deriving the expression in terms of time:

$\frac{ds}{dt}=\frac{r_{A}\cdot \frac{dr_{A}}{dt}+r_{B}\cdot \frac{dr_{B}}{dt}}{\sqrt{r_{A}^{2}+r_{B}^{2}} }$

Where $\frac{dr_{A}}{dt} = 500\,\frac{mi}{h}$ and $\frac{dr_{B}}{dt} = 550\,\frac{mi}{h}$ , respectively. Distances of each airliner at 2:30 PM are:

$r_{A}= (500\,\frac{mi}{h})\cdot (1.5\,h)\\r_{A} = 750\,mi$

$r_{B}=(550\,\frac{mi}{h} )\cdot (1.5\,h)\\r_{B} = 825\,mi$

The rate of change is:

$\frac{ds}{dt}=\frac{(750\,mi)\cdot (500\,\frac{mi}{h} )+(825\,mi)\cdot(550\,\frac{mi}{h})}{\sqrt{(750\,mi)^{2}+(825\,mi)^{2}} }$

$\frac{ds}{dt}\approx 743.303\,\frac{mi}{h}$

6 0

3 years ago

The perimeter of a regular pentagon is 45 inches. Find the length of each side

Schach [20]

Answer: 9

Step-by-step explanation: pentagon has 5 sides so divide 45 by 5

4 0

2 years ago

Questions 4-6 thanks if you help

Ray Of Light [21]

Here's what I did which might help you

5 0

3 years ago

Will mark brainliest

Arlecino [84]

Answer:

Step-by-step explanation:

D = 8.5 miles/h x 2h

= 17 miles

3 0

2 years ago

Help me please, the question is in the picture^^^!

Nat2105 [25]

Answer:

79.3

Step-by-step explanation:

2,037,634= 100 percent

1,614,840=x

x=1,614,840×100÷2,037,634

x=79.25

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3 years ago