Help me with this two questions

Mathematics

1 answer:

Anni [7]3 years ago

5 0

First question: 0

Second question: 0.94

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A basketball shot is taken from a horizontal distance of 5m from the hoop. The height of the ball can be modelled by the relatio

olasank [31]

This is the concept of application of quadratic expressions. Given that the height of the ball is modeled by the equation;
h=-7.3t^2+8.25t+2.1+5
The time taken for the ball to hit the ground will be given as falls;
-7.3t^2+8.25t+7.1=0
to solve for t we use the quadratic formula;
t=[-b+/-sqrt(b^2-4ac)]/(2a)
a=-7.3, b=8.25, c=2.1
t=[-8.25+/-sqrt[8.25^2+4*7.3*7.1]/(-2*7.3)
t= -0.572
or
t=1.702
since there is not negative time we take the time taken for the ball to hit the ground will be: t=1.702 sec

7 0

3 years ago

Q7: Determine the graph of the polar equation r = 12/6+4n cos theta.

iVinArrow [24]

Answer:

Choice B

Step-by-step explanation:

The first step is to write the polar equation of the conic section in standard form by dividing the numerator and denominator by 6;

$r=\frac{2}{1+\frac{2}{3}cos theta }$

The eccentricity of this conic section is thus 2/3, the coefficient of cos theta. Clearly, the eccentricity is between o and 1 implying that this conic section represents an Ellipse.

Lastly, the ellipse will open towards the left since we have positive cos theta in the denominator. The only graph that meets the conditions is graph B.

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2 years ago

PLEASE HELP ME!!!!I NEED HELP

ycow [4]

just plug the numbers on the graph like (2,50)

8 0

2 years ago

If you jump 8 times in 20 sec how many jumps can you make in 45 seconds at this rate

11Alexandr11 [23.1K]

20 jumps because 45/20 is 2.5 and 8 x 2.5 is 20.

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1 year ago

Based on the audio, what is an activity Carlos doesn't do every morning?

GREYUIT [131]

Do ph and probably cheat

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2 years ago