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attashe74 [19]
3 years ago
6

Two walkers 16 miles apart travel toward each other. One travels 3 miles per hour, and the other 4 miles per hour. If the latter

is delayed 3 hours, how many hours before they meet?
Mathematics
1 answer:
lapo4ka [179]3 years ago
7 0

Answer:

28

For This Question

if you need steps ask me

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Match the numbers to the correct number sentence 1. seven thousand, twenty-eight 1 7,828 2. seven thousand, two hundred eight 9,
kicyunya [14]
1. 7,028 2. 7,208 3. 7,288 4. 7,828 5. 7,088 6. 2,570 7. 2,507 8. 2,577 9. 2,057 10. 2,077 11. 9,009 12. 9,900 13. 9,090 14. 9,099 15. 9,999
8 0
3 years ago
Please help very urgent!!
sashaice [31]

9514 1404 393

Answer:

  the n-th root of the ratio of ending to starting values, less 1

Step-by-step explanation:

When I have starting and ending values over a time period, I usually use those directly in the exponential equation. If you're asked for a percentage growth rate, then you have to convert the growth factor to a growth rate.

__

The exponential equation can be written ...

  f(t) = (initial value) × ((final value)/(initial value))^(t/(time period))

In your example case, this would be ...

  f(t) = 2 × (20/2)^(t/18)

  f(t) = 2(10^(t/18)) . . . . . . simplified

__

To convert this to the form ...

  f(t) = 2(1 +(growth rate))^t

recognize that ...

  (1 +(growth rate)^t = (10^(1/18))^t

So, you need to find the value of ...

  10^(1/18) = 10^(1/18) ≈ 1.13646 = 1 + 13.646%

Then the growth rate is about 13.6% each week.

__

Sometimes, you want to use this in the form ...

  f(t) = (initial value)×(1 + (growth rate))^t

and sometimes you want the form ...

  f(t) = (initial value)×e^(kt)

When you solve for k, you find it is ...

  k = ln(1 + (growth rate)) . . . . . . . . where ln(x) is the natural logarithm of x

Here, that is ...

  k = ln(10^(1/18)) = ln(10)/18 ≈ 0.12792

__

Your final growth equation could be any of ...

  f(t) = 2(10^(t/18)) . . . . . . . my personal favorite, as no rounding is involved

  f(t) = 2(1.13646^t)

  f(t) = 2e^(0.12792t)

5 0
3 years ago
Which statements accurately describe how to determine the y-intercept and the slope from the graph below?
Andru [333]

Answer:

Select one of the two bottom statements which both read "To find the y-intercept, begin at the origin and move vertically to the graphed line. To find the slope, use two ordered pairs on the line and substitute into the equation ."

Step-by-step explanation:

The y-intercept of a function is the point where the graph intersects the y-axis. Since the y-axis is the vertical line through the origin, we can start at the origin (0,0) and move up or down to where the line crosses the axis. This (0,y) point is the y-intercept. It is always (0,y) because it is located on the y-axis where x=0.

The slope of a function of a function is the rise/run or rate of change of the function. It can be seen on the graph of a line between any two coordinate pairs of the line. We know it as the variable m in linear function equations. To find it using an equation, we chose the point-slope form yy_{2}-y_{1} = m(x_{2}-x_{1}). We substitute two coordinate pairs from the line for (x_{1},y_{1} ) and (x_{2},y_{2}) to find the missing value m or slope of the line.

8 0
3 years ago
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Algebra Find the volume of the three-dimensional figure in terms of x.
Citrus2011 [14]

Answer:

Step-by-step explanation:

8 0
3 years ago
The list price for a dress is $90 if a discount of $10.80 was given for paying cash what percent of the list price was the disco
Vika [28.1K]

Answer:

12% discount

Step-by-step explanation:

5 0
4 years ago
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