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3 years ago

Please help last question will mark brainliest

Mathematics

1 answer:

Damm [24]3 years ago

6 0

U sell a product that was purchased for $750 for $1500, this means cash increases by $750 and owners equity increases by $750

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Easy question - giving brainly is correct and work is shown!

Ymorist [56]

Answer:

the answer is 102 pls mark brainlest

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3 years ago

5e = 18.1 ---I gotta know what number the e is---

Inessa [10]

Answer:

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Step-by-step explanation:

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3 years ago

If Peter pays $84 to buy a watch after discount of 20% find the original price of the watch

Kamila [148]

Answer:

$100.80

Step-by-step explanation:

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3 years ago

Asking for help with this question...for the 6th time (look at the picture) 15 points

shepuryov [24]

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3 years ago

A plane flying horizontally at an altitude of 1 mi and a speed of 470 mi/h passes directly over a radar station. Find the rate a

kiruha [24]

Answer:

407 mi/h

Step-by-step explanation:

Given:

Speed of plane (s) = 470 mi/h

Height of plane above radar station (h) = 1 mi

Let the distance of plane from station be 'D' at any time 't' and let 'x' be the horizontal distance traveled in time 't' by the plane.

Consider a right angled triangle representing the above scenario.

We can see that, the height 'h' remains fixed as the plane is flying horizontally.

Speed of the plane is nothing but the rate of change of horizontal distance of plane. So, $s=\frac{dx}{dt}=470\ mi/h$

Now, applying Pythagoras theorem to the triangle, we have:

$D^2=h^2+x^2\\\\D^2=1+x^2$

Differentiating with respect to time 't', we get:

$2D\frac{dD}{dt}=0+2x\frac{dx}{dt}\\\\\frac{dD}{dt}=\frac{x}{D}(s)$

Now, when the plane is 2 miles away from radar station, then D = 2 mi

Also, the horizontal distance traveled can be calculated using the value of 'D' in equation (1). This gives,

$2^2=1+x^2\\\\x^2=4-1\\\\x=\sqrt3=1.732\ mi$

Now, plug in all the given values and solve for $\frac{dD}{dt}$ . This gives,

$\frac{dD}{dt}=\frac{1.732\times 470}{2}=407.02\approx 407\ mi/h$

Therefore, the distance from the plane to the station is increasing at a rate of 407 mi/h.

6 0

4 years ago