1 year ago

When is the best time to round a number in a multi-step problem?

Mathematics

1 answer:

Usimov [2.4K]1 year ago

5 0

Answer:

At the end of the multi step problem

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4. How fast was a driver going if the car left skid marks that were 32 feet long on dry concrete? (The coefficient of friction i

Monica [59]

Answer:

$v_{o} \approx 31.247\,mph$

Step-by-step explanation:

The deceleration experimented by the car is the product of kinetic coefficient of friction and gravitational constant:

$a = \mu_{k}\cdot g$

$a = (1.02)\cdot \left(32.174\,\frac{ft}{s^{2}} \right)$

$a = 32.817\,\frac{ft}{s^{2}}$

The initial speed is computed from the following kinematic expression:

$v^{2} = v_{o}^{2} - 2\cdot a \cdot \Delta s$

$v_{o} = \sqrt{v^{2}+2\cdot a\cdot \Delta s}$

$v_{o} = \sqrt{\left(0\,\frac{ft}{s} \right)^{2}+2\cdot \left(32.817\,\frac{ft}{s^{2}} \right)\cdot (32\,ft)}$

$v_{o}\approx 45.829\,\frac{ft}{s}$

$v_{o} \approx 31.247\,mph$

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3 years ago

Find the volume of the figure below.

Gala2k [10]

$V=\pi r^{2} h\\V=\pi (3)^{2} (6)\\V=\pi (9)(6)\\V=54\pi units^{3} \\ or\\V=169.64(rounded to hundredth)$

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2 years ago

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julsineya [31]

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4/2, 2/7, 1/2, 5/6 is your answer

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The store had a special on apples, 4 pounds for $2.80. The store's special on oranges was 3 pounds for $2.58. Which of the follo

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Answer:

Step-by-step explanation:

Hope this helps!!

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Solve 24x+8x-11x= -7-14

kolbaska11 [484]

24x+8x= 32x
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3 years ago

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