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3 years ago

This is confusing please help

Mathematics

1 answer:

Tomtit [17]3 years ago

3 0

Answer:

1. Range: take the difference between the highest and lowest values in a set of numbers. In this case it's 2 and 45.

2. Mean: Mean is the average of the numbers. This is pretty easy just add up all the numbers you see and divide by how many there are.

3. Median: The median is basically taking your numbers and organizing then. Then you go through and cross off every number until you get to the one number in the middle. If you have 1 answer, then that's your answer..But if you have two numbers in the middle add them up and divide by 2.

4. Mode: Mode is the value that appears most often. In this case it would be 16 and 3.

Larger (upper) and lower quartile: if you have a calculator this might help a lot when finding what you are looking for. But anyways this is for TI-84 plus calculator. Go to stat, press 1. edit, then enter your numbers, press start again, move right to calc, and press 1 again. Scroll down and press calculate, then scroll all the way down and find Q1 (lower) and Q3 (upper)

Step-by-step explanation:

Range: 45-2 = ? (I will let you solve this part yourself)

Mean: 5 + 16+ 45 + 12 + 11 + 9+ 16 + 21 + 2 + 3 + 8 + 3 + 7 + 2 + 5 = ? ÷ 15 (I believe that how many numbers there are, I can't tell)

Median: 2, 3, 3, 5, 7, 8, 9, 11, 12, 16, 16, 45, in this case you will be left with two numbers. So once you cross off the numbers and get to the middle remember to add together the middle numbers and divide by 2.

Mode: 16 and 3

Larger and lower quartile: Q1: 3 and Q3: 16

(if this isn't it try minx: 2 and maxx: 45)

I think they should help explain what you are doing and get you started. Sorry I couldn't be much more help. :)

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3 years ago

12.6% of RI 149 390bn

galina1969 [7]

Answer: RI 18,823.14

Step-by-step explanation:

I guess that we want to find the 12.6% of Rl 149,390

First, we assume that Rl 149,390 is the 100%

Then we can write an equation like:

Rl 149,390 = 100%

Then if the amount X is the 12.6%, we also have the equation:

X = 12.6%

Then we have the two equations:

X = 12.6%

Rl 149,390 = 100%

If we take the quotient between these two equations we get:

(X/Rl 149,390) = (12.6%/100%)

Solving this for X we get:

X = (12.6%/100%)*(Rl 149,390) = RI 18,823.14

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3 years ago

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Anna11 [10]

Answer:
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3 years ago

An explosion causes debris to rise vertically with an initial speed of 120 feet per second. The formula h equals negative 16 t s

Novay_Z [31]

Answer:

The debris will be at a height of 56 ft when time is 0.5 s and 7 s.

Step-by-step explanation:

Given:

Initial speed of debris is, $s=120\ ft/s$

The height 'h' of the debris above the ground is given as:

$h(t)=-16t^2+120t$

As per question, $h(t)=56\ ft$ . Therefore,

$56=-16t^2+120t$

Rewriting the above equation into a standard quadratic equation and solving for 't', we get:

$-16t^2+120t-56=0\\\textrm{Dividing by -8 throughout, we get}\\\frac{-16}{-8}t^2+\frac{120}{-8}t-\frac{56}{-8}=0\\2t^2-15t+7=0$

Using quadratic formula to solve for 't', we get:

$t=\frac{-b\pm \sqrt{b^2-4ac}}{2a}\\\\t=\frac{-(-15)\pm \sqrt{(-15)^2-4(2)(7)}}{2(2)}\\\\t=\frac{15\pm \sqrt{225-56}}{4}\\\\t=\frac{15\pm\sqrt{169}}{4}\\\\t=\frac{15\pm 13}{4}\\\\t=\frac{15-13}{4}\ or\ t=\frac{15+13}{4}\\\\t=\frac{2}{4}\ or\ t=\frac{28}{4}\\\\t=0.5\ s\ or\ t=7\ s$