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4 years ago

How much time does it take for a bird flying at a speed of 45 kilometers per hours to travel a distance of 1,800 kilometers

Mathematics

1 answer:

____ [38]4 years ago

4 0

Step-by-step explanation:

This is simply a case of division. since you already know that the bird is flying at 45 kilometres per hour, you should be able to devise that every hour the bird is going 45km

we are gonna use ratio for this

1:45

?:1800

first of all divide 1800 by 45, to find the number you are gonna multiply the other number by, secondly multiply ur answer by 1 since that is the number of hours it takes to for the bird to travel 45km, after u have suceeded in doing this, you already have ur answer which is 1800 divide by 45 times 1

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In your computation, approximate its value as 3.14.

andrey2020 [161]

Answer: d

Step-by-step explanation:

Find the area of the rectangle.

$A=l*w\\A=(15in)(12in)\\A=180in^2$

Find the area of the base of the semicircle.

$A=\pi r^2$

12 in would be the diameter, divide by 2 to get the radius.

$\frac{12}{2}=6$

Plug this into the formula.

$A=(3.14)(6)^2\\A=113.04in^2$

Since we do not have a full circle but a semi one instead, we must divide our result by 2.

$\frac{113.04}{2}=56.52in^2$

Add both areas.

180+56.52=236.52 $in^2$

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3 years ago

An object is acted upon by the forces F1=<10,6,4> and F2=<0,3,9>. Find the force F3 that must act on the object

murzikaleks [220]

$\vec F_3=\langle x,y,z\rangle$ is a force vector such that

$\vec F_1+\vec F_2+\vec F_3=\vec0$

$\implies\langle10,6,4\rangle+\langle0,3,9\rangle+\langle x,y,z\rangle=\langle0,0,0\rangle$

$\implies\begin{cases}10+x=0\\9+y=0\\13+z=0\end{cases}\implies x=-10,y=-9,z=-13$

So the missing force is

$\boxed{\vec F_3=\langle-10,-9,-13\rangle}$

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3 years ago

Convert the following decimal to a common fraction. Reduce to lowest terms 0.625 = 62/100 7/8 5/8 6 2/5

VashaNatasha [74]

Answer:

the answer would be 5/8

Step-by-step explanation:

0.625/1 times 1000/1000= 625/1000

625/1000 divided by 125 = 5/8

hoped this helped let me know if you got it right

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3 years ago

Each month your cell phone company charges you $ 50 for your plan plus 3 cents for each text you send. You have $ 140 budgeted f

pshichka [43]

Answer:

3000 text messages can be sent without breaking the budget.

Step-by-step explanation:

Since each month your cell phone company charges $ 50 for your plan plus 3 cents for each text you send, and you have $ 140 budgeted for cell phone expenses for the month, to make a determination about the number of texts you can send each month the following calculation must be performed:

(140 - 50) / 0.03 = X

90 / 0.03 = X

3000 = X

Therefore, 3000 text messages can be sent without breaking the budget.

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3 years ago

Find the length of BC.

Umnica [9.8K]

Answer:

BC = 8

Step-by-step explanation:

AB + BC = AC

4x + 8 + 3x - 4 = 32

7x + 4 = 32

7x = 32 - 4

7x = 28

x = 28/7

x = 4

BC = 3x - 4 = 3*4 - 4 = 12 - 4 = 8

3 0

2 years ago

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