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kumpel [21]
3 years ago
7

Rodney drops a ball from the bridge at an initial height of 220 feet. How many seconds after the ball is released will it hit th

e ground? Write an equation to model this situation. Solve for time in seconds. Show work
Mathematics
1 answer:
bixtya [17]3 years ago
4 0

Answer:

t = √(2d/g); 3.70 s  

Step-by-step explanation:

The formula for the distance (d) travelled by a falling object in time (t) is  

d = ½gt²

Multiply each side by 2                    2d = gt²

Divide each side by g                 (2d/g) = t²

Take the square root of each side     t = √(2d/g)

Data:

d = 220 ft

g = 32.17 ft·s⁻²

Calculation:

t = √ [(2 × 220)/32.17] = √13.68 = 3.70 s

The ball will hit the ground 3.70 s after it is released.

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Find the value of X in X-X³=17​
Karolina [17]

Answer:

Step-by-step explanation:

Step1: find the interval of roots. Consider -3 and -2

f(-3) = -7

f(-2) = 18 >0

Hence, the root must be on [-3,-2]

Step2:  consider the middle point -2.5

f(-2.5) = 3.875 >0

Then, the root must be on [-3, -2.5]

Step 3: Repeat step 2 by finding the value of f at the middle point -2.75

f(-2.75) = -1.0468

Step 3: Repeat step 2 by finding the value of f at the middle point of the interval [-2.75,-2.5] which is -2.625

f(-2.625) = 1.537 >0

Step4: Repeat step 2 on [-2.75, -2.625]

Repeat step 2 until you got the root which is -2.701

5 0
3 years ago
Help plz and thx for your help
Bumek [7]

9514 1404 393

Answer:

  Dawn has $1670 in account 1 and $1570 in account 2.

Step-by-step explanation:

Dawn can multiply the second equation by 8 and add 7 times the first equation.

  8(3/8A +7/8B) +7(A -B) = 8(2000) +7(100)

  10A = 16,700

  A = 1670

  B = 1570 . . . . 100 less than A

Dawn has $1670 in account 1 and $1570 in account 2.

__

<em>Check</em>

  3/8(1670) +7/8(1570) = 626.25 +1373.75 = 2000

3 0
2 years ago
Choose the symbol that correctly compares the fractions below.<br> 8/9 ? 1/9
gladu [14]

Answer:

Which means that this equation is also true: 8/9 > 1/9

Step-by-step explanation:

Is 8/9 less than 1/9? Is 8/9 smaller than 1/9? These are the same questions with one answer.

To get the answer, we first convert each fraction into decimal numbers. We do this by dividing the numerator by the denominator for each fraction as illustrated below:

8/9 = 0.889

1/9 = 0.111

Then, we compare the two decimal numbers to get the answer.

0.889 is not less than 0.111.

Therefore, 8/9 is not less than 1/9 and the answer to the question "Is 8/9 less than 1/9?" is no.

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