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Sidana [21]
3 years ago
13

James estimated the total cost of groceries to be $50. The actual cost of the groceries is $65. What is the percent error? Round

your answer to the nearest whole percent. Enter your answer in the box.
_____%
Mathematics
2 answers:
Brrunno [24]3 years ago
8 0

I just took the quiz and it was 23.

Alex777 [14]3 years ago
7 0

To get percent error you take actual-predicted and divide by the actual then multiply by 100 to get the percent.

65-50=15

15/60=0.25

0.25 times 100 =25%

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Read 2 more answers
A soccer ball is kicked toward the goal. The height of the ball is modeled by the function h(t) = −16t2 + 48t where t equals the
Stolb23 [73]

Answer:

  • t = 1.5; it takes 1.5 seconds to reach the maximum height and 3 seconds to fall back to the ground.

Explanation:

<u>1) Explanation of the model:</u>

  • Given: h(t) = -16t² + 48t

  • This is a quadratic function, so the height is modeled by a patabola.

  • This means that it has a vertex which is the minimum or maximu, height. Since the coefficient of the leading (quadratic) term is negative, the parabola opens downward and the vertex is the maximum height of the soccer ball.

<u>2) Axis of symmetry:</u>

  • The axis of symmetry of a parabola is the vertical line that passes through the vertex.

  • In the general form of the parabola, ax² + bx + c, the axis of symmetry is given by x = -b/(2a)

  • In our model a = - 16, and b = 48, so you get: t = - ( 48) / ( 2 × (-16) ) = 1.5

<u>Conclusion</u>: since t = 1.5 is the axys of symmetry, it means that at t = 1.5 the ball reachs its maximum height and that it will take the same additional time to fall back to the ground, whic is a tolal of  1. 5 s + 1.5 s = 3.0 s.

Answer: t = 1.5; it takes 1.5 seconds to reach the maximum height and 3 seconds to fall back to the ground.

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3 years ago
Consider the function f(x)=2x2+7x−30.<br><br> What are the zeros of the function?
Nimfa-mama [501]

Answer:

Zeroes are: (-6, 0) and (2.5, 0)

x= -6  &  x= 2.5

Step-by-step explanation:

I recommend using desmos for graphing problems!

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