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LekaFEV [45]
3 years ago
13

Which square root is a rational number ? Square root 50, square root 70, square root 81, square root 96

Mathematics
1 answer:
Elis [28]3 years ago
8 0

Answer:

square root of 81

Step-by-step explanation:

\sqrt{81}  = 9

so 9 is rational number.

the rest are irrational number

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Factor -4x^2+16x-24 completely
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If a ball is thrown directly upward with a velocity of 50ft/s, it's height (in feet) after t seconds is given by y=50t-16t^2 wha
Tomtit [17]

Answer:

39.0625 ft

Step-by-step explanation:

Since the function is a quadratic representing height, and the coefficient of the t² is negative, the vertex of the parabola will be the maximum height achieved by the ball.  

The general form for a quadratic equation is ax² + bx + c, here a is -16, and b is 50

To find the x coordinate of the vertex, use   x = -b/(2a)

We have x = -50/[2(-16)]

               

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Now plug that into the equation to find the y value, which will be the height...

y = 50(25/16) - 16(25/16)²

    y = 1250/16 - 16(625/256)

        y = 1250/16 - 625/16

              y = 625/16

                   y = 39.0625

7 0
3 years ago
Please help me understand the question
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Answer:

a and c

Step-by-step explanation:

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