Can ppl help me? plss !! ii will mark brainly for the first correct person

Mathematics

2 answers:

velikii [3]3 years ago

8 0

The pictures are in different orders when i click them but
spear with the radius of 16s volume is 17157.28
the spear with a radius of 8s volume is 2144.66
the cone with a radius of 15s volume is
5419.25
the cone with a radius of 7s volume is 872.32
and the volume of the cylinder is 351.86

Yakvenalex [24]3 years ago

3 0

For the first problem the sphere with a radius of 16cm the answers is 17157.28
For the cone with a radius of 15 and height of 23, the answer is 5419.25
For the sphere with a radius of 8 the answer is 2144.6
For the cylinder with a radius of 4 and height of 7 the answer is 351.86
And finally for the cone with a radius of 7 and height of 17 the answer is 872.32

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I need help asap worth 100pts

Lunna [17]

Answer:

It depends how your calculator calculates quadratic regressions.

For my calculator:

Go to Statistics menu
Select quadratic regression: y=a+bx+cx²
Input the x and y values from the given table
Go to options and select regression calc

a = 1.177142857 = 1.18 (nearest hundredth)

b = 42.22257143 = 42.22 (nearest hundredth)

c = -12.87142857 = -12.87 (nearest hundredth)

⇒ y = 1.18 + 42.22x - 12.87x²

Therefore, the quadratic regression equation in standard form is:

$y = -12.87x^2+ 42.22x + 1.18$

To estimate the height of the rocket after 5 seconds, input x = 5 into the regression equation:

$\implies -12.87(5)^2+ 42.22(5) + 1.18=-109.47$

As this gives us a negative value, this means that the rocket would have come back to the ground before 5 s. Therefore, the height of the rocket at 5 s will be 0 ft.

(see attached graph → the rocket will hit the ground at approx 3.3 s)