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drek231 [11]
2 years ago
8

When designing the jumps of a BMX racetrack, the jumps involve a launch ramp and a landing ramp. What are some facts about the p

lacement of these features? Check all that apply.
There must be at least ten launch ramps in every course.


The slope of a launch ramp cannot be too high or too low.


The length of a landing ramp must be long enough for riders to recover from the jump, but short enough so they do not lose speed for the next jump.


There can only be one landing ramp in every course.


The slope of a ramp is found by dividing the height of the ramp by the length of the ramp.
Mathematics
2 answers:
Mice21 [21]2 years ago
7 0
<h2>Answer:</h2>

<u>The correct options are </u>

  • The slope of a launch ramp cannot be too high or too low.  
  • The length of a landing ramp must be long enough for riders to recover from the jump, but short enough so they do not lose speed for the next jump.
<h2>Step-by-step explanation:</h2>

BMX racetracks have jumps made for competition and racing. These ramps and jumps must be made in proper format. The height and slope of the jumps must be good enough to avoid any injury to the rider. A higher jump can cause a higher push to the bicycle and when it hit the ground, the rider may fall down and get hurt. In the same way the slope on both launch and land must be kept smooth and proper to avoid falling of the rider.

zaharov [31]2 years ago
5 0

The second third and last one


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dangina [55]
5 hours + 4 hours = 9 hours
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60 minutes in an hour, so 75 minutes =1 hour and 15 minutes, or 1.25 hours
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1 year ago
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In a country where prices are rising quickly, bread that now costs $1.39 will cost 2.4 times as much next year. How much will th
Lynna [10]

Answer:

$3.34

Step-by-step explanation:

$1.39 x 2.4 = $3.336

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2 years ago
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Tyler reads 2/15 of a book on Monday, 1/3 of it on tuesday, 2/9 of it on Wednesday, and 3/4 of the remainder on thus day. If he
kykrilka [37]

The number of pages in the book is 180

<u>Explanation:</u>

The first thing we should do is to convert these fractions to percentage

Monday = \frac{2}{15} X 100 = 13.33\\\\Tuesday = \frac{1}{3} X 100 = 33.33%\\\\\\Wednesday = \frac{2}{9} X 100 = 22.22%\\\\\\\\

3/4 of the remainder on thursday:

Thursday: (100 - (13.33 + 33.33 + 22.22) * (3/4) = 23.33%

he still has 14 pages left to read on friday

Friday:  [100 - (13.33 + 33.33 + 22.22) ] - 23.33 = 7.77%

Which means that 14 pages represent 7.77% of the book.

Therefore the number of pages of the book is given by:

=\frac{100}{7.77} X 14\\\\= 180

Therefore, number of pages in the book is 180

4 0
1 year ago
Arrange these functions from the greatest to the least value based on the average rate of change in the specified interval.Tiles
Ugo [173]

By definition, the average rate of change is given by:

AVR = \frac{f(x2)-f(x1)}{x2-x1}

We evaluate each of the functions in the given interval.

We have then:

For f (x) = x ^ 2 + 3x:

Evaluating for x = -2:

f (-2) = (-2) ^ 2 + 3 (-2)\\f (-2) = 4 - 6\\f (-2) = - 2

Evaluating for x = 3:

f (3) = (3) ^ 2 + 3 (3)\\f (3) = 9 + 9\\f (3) = 18

Then, the AVR is:

AVR = \frac{18-(-2)}{3-(-2)}

AVR = \frac{18+2}{3+2}

AVR = \frac{20}{5}

AVR = 4


For f (x) = 3x - 8:

Evaluating for x =4:

f (4) = 3 (4) - 8\\f (4) = 12 - 8\\f (4) = 4

Evaluating for x = 5:

f (5) = 3 (5) - 8\\f (5) = 15 - 8\\f (5) = 7

Then, the AVR is:

AVR = \frac{7-4}{5-4}

AVR = \frac{3}{1}

AVR = 3


For f (x) = x ^ 2 - 2x:

Evaluating for x = -3:

f (-3) = (-3) ^ 2 - 2 (-3)\\f (-3) = 9 + 6\\f (-3) = 15

Evaluating for x = 4:

f (4) = (4) ^ 2 - 2 (4)\\f (4) = 16 - 8\\f (4) = 8

Then, the AVR is:

AVR = \frac{8-15}{4-(-3)}

AVR = \frac{-7}{4+3}

AVR = \frac{-7}{7}

AVR = -1


For f (x) = x ^ 2 - 5:

Evaluating for x = -1:

f (-1) = (-1) ^ 2 - 5\\f (-1) = 1 - 5\\f (-1) = - 4

Evaluating for x = 1:

f (1) = (1) ^ 2 - 5\\f (1) = 1 - 5\\f (1) = - 4

Then, the AVR is:

AVR = \frac{-4-(-4)}{1-(-1)}

AVR = \frac{-4+4}{1+1}

AVR = \frac{0}{2}

AVR = 0


Answer:

from the greatest to the least value based on the average rate of change in the specified interval:


f(x) = x^2 + 3x interval: [-2, 3]

f(x) = 3x - 8 interval: [4, 5]

f(x) = x^2 - 5 interval: [-1, 1]

f(x) = x^2 - 2x interval: [-3, 4]


4 0
1 year ago
Isabella saved 2 nickels today. If she doubles the number of nickels she saves each day, how many days, including today, will it
luda_lava [24]

Answer:

Step-by-step explanation:

Alright, lets gets started.

First day, she saves nickels = 2

As we know, she doubles the number of nickels she saves each day.

Means second day she saves nickels = 2*2 = 4

Third day she saves nickels = 2*4 = 8

Fourth day she saves nickels = 2*8=16

Hence we have 2 + 4 + 8 + 16...

It is like a geometric series, the sum of nickels she needs more than 500.

So, lets see how many days she will take to save 500 nickels first

Using the sum formula for geometric series

s=\frac{a(1-r^n)}{(1-r)}

where s is sum, r is multiplication factor, that is 2 in this case and a is first term of series that is 2 also

500=\frac{2(1-2^n)}{(1-2)}

Simplifying, dividing 2 in both sides

250=\frac{(1-2^n)}{(1-2)}

250=\frac{(1-2^n)}{-1}

Cross multiplying

-250=1-2^n

2^n-1=250

2^n=251

Taking log on both sides

nlog2=log251

n=\frac{log251}{log2}=7.971

It means it will take 8 days to save mmore than 500 nickels.   :  Answer

Hope it will help :)


8 0
2 years ago
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