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navik [9.2K]
3 years ago
13

A helicopter above the ground is descending at 3.5 m/s. It drops a package from rest (relative to the helicopter). Just before i

t hits the ground the package is falling at a rate of 13.4 m/ s relative to the ground. Find the velocity of the package relative to the helicopter.
Mathematics
1 answer:
Brrunno [24]3 years ago
6 0

We are given that helicopter is descending at 3.5 m/s and a package is dropped from helicopter.

Its speed relative to helicopter is 0, that means it is started with the same speed as helicopter that is 3.5 m/sec relative to ground.

And when it reaches ground, its speed is 13.4 m/sec relative to ground.

Packet speed relative to helicopter = packet speed - helicopter speed

                                          = 13.4 - 3.5 = 9.9 m/sec

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Harrizon [31]

I am pretty sure the value of ‘n’ is 2.5!

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What is the correct way to write 9 x 9 x 9 in exponential form?
Harlamova29_29 [7]

Hey!

----------------------------------------------

Solution:

Put all the answer choices into expanded form.

3^9 = 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3

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Solve by using Pythagorean Theorem, a= 5, b= x-1, and c=x
charle [14.2K]

The value of x is 13, from the values of x the values of a,b and c becomes 5, 12 and 13, which is obtained by using Pythagorean theorem.

Step-by-step explanation:

The given is,

             a = 5

             b = x - 1

             c = x

Step:1

      Pythagorean theorem is,

              a^{2} + b^{2} = c^{2}................................(1)

      (  It states that the area of the square whose side is the hypotenuse is equal to the sum of the areas of the squares on the other two sides )

      From the given values the equation (1) becomes,

                       5^{2} + (x-1) ^{2} = x^{2}

                             ( (a-b)^{2} = a^{2}  + b^{2} -2ab )

               25 + ( x^{2} + 1 - 2x ) = x^{2}

                           25 + 1 -2x = 0               ( ∵ Eliminate x^{2} in both sides)

                                     26 = 2x

                                       x = 13

Step:2

        From the values of x,

                   a = 5

                    b = ( 13 - 1 ) = 12

                   c = 13

Result:

            The value of x is 13, from the values of x the values of a,b and c becomes 5, 12 and 13, which is obtained by using Pythagorean theorem.

3 0
3 years ago
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