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Luba_88 [7]
2 years ago
10

The table shows the number of students who signed up for different after school activities.

Mathematics
2 answers:
Oxana [17]2 years ago
3 0

Answer:

C. None of the above

Step-by-step explanation:

we know that

The number of students who signed up for different after school activities are

Cooking------------> 9 students

Chess---------------> 4 students

Photography-----> 8 students

Robotics-----------> 11 students

Total of students -----> (9+4+8+11)=32

<u><em>Verify each statement</em></u>

case A) The ratio of photography students to all is 4:1

The statement is false

Because the ratio of photography students to all is 8:32

Simplify

1:4

case B) For every 1 chess student there are a total of 16 students

The statement is false

Because the ratio of chess student to all is 4:32

Simplify

1:8

so

For every 1 chess student there are a total of 8 students

therefore

C. None of the above

anygoal [31]2 years ago
3 0

Answer:

C

Step-by-step explanation:

I took the quiz :)

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A ball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. The ball's height h (in feet) after t s
ella [17]

Answer:

t = 2.52 seconds

Step-by-step explanation:

h=139-15t-16t^2

We want to know when the ball hits the ground

That would be when h=0

0 = 139-15t-16t^2

We can use the quadratic formula to find t

t = -b ± sqrt(b^2-4ac)

       ----------------------

          2a

where a = -16   b = -15  and c = 139

t = -(-15) ± sqrt((-15)^2-4(-16)139)

       ----------------------

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t = (15) ± sqrt(225+8896)

       ----------------------

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t = (15) ± sqrt(9121)

       ----------------------

          -32

t = 15+ sqrt(9121)                       t = 15- sqrt(9121)

     --------------------   or                    -------------------  

           -32                                               -32

        -3.453247707        or              2.515747707

Since time cannot be negative

 2.515747707

Round to the nearest hundredth

t = 2.52 seconds

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Answer:

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Step-by-step explanation:

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