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Helga [31]
2 years ago
6

Helppp pleaseeeeeeeee

Mathematics
2 answers:
stellarik [79]2 years ago
4 0

Answer:

Step-by-step explanation:

I wish I could help you but I’m only in elementary

Neporo4naja [7]2 years ago
3 0

Answer:

Surface Area = 530yd^2

Step-by-step explanation:

<em>*This answer is for the problem on the left that seems unanswered*</em>

Firstly, you must understand that the <u>surface area</u> of an irregular polygon like the one in the problem must be found by dividing its faces into rectangles and finding the sum of the areas of those rectangles.

<em>Another way to say this is that the surface areas of these solids can be found by adding up the areas of the rectangles that make their faces.</em>

You will see that I attached a picture that divides the solid's faces into subsections, labelled <u>a through i</u>, including faces that are <em>not visible in the diagram</em>.

If you divided the solid's faces in the same way as the picture, the surface area is found as follows:

Area_A=12*7=84yd^2\\Area_B=12*4=48yd^2\\Area_C=12*4=48yd^2\\Area_D=4*4=16yd^2\\Area_E=11*3=33yd^2\\Area_F=12*3=36yd^2\\Area_G(notVisible)=12*11=132yd^2\\Area_H(notVisible)=12*7=84yd^2\\Area_I(notVisible)=Area_E+Area_D=33+16=49yd^2

<em>By the way, </em>yd^{2} is the same as "square yards".

After finding the areas of each rectangle, add them all up to get your final answer:

SurfaceArea=530yd^2

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Please select the word from the list that best fits the definition
Ann [662]

Answer:

-line graph

Step-by-step explanation:

We are going to take the definition of all the terms and then deduced our correct answer.

<u>Pictograph</u> : Pictograph also known as pictogram uses picture to represent data.

<u>Pie graph</u>: It is a chat that uses pie slices to represent relative size of data.

<u><em>Line graph:</em></u> A line graph is a graph with points connected by lines to show changes in value  over time.

<u>Bar graph</u>: A bar graph uses rectangular box known as bars to represent data, it is relatively used to show size

<u>Double bar graph</u> : A double bar graph uses two bars beside each other two represent data. It can be used to compare two data groups.

From the above definition, we can deduced that the word that shows data over time is the line graph  

6 0
2 years ago
160 feet of lumber at $2.49 per foot
MissTica

Answer:

$398.4

Step-by-step explanation:

160x$2.49=398.4

7 0
3 years ago
2. The pool maintenance man forgot to bring his logarithmic charts, and he needs to raise
rusak2 [61]

Answer:

hey have made this a little more confusing than it has to be. Usually we use H+ in chemistry instead of t, but you can also use X, Y if it's easier where Y = -log(X) where X= hydronium and Y = pH.

Which also means Y=p(t) and X = t.

To graph this, I would suggest using values for X like 0.1, 0.2, 0.5, 0.7, 1.0, 1.5, or similar numbers. Then use your calculator to calculate Y values for each of these X values and plot them. You can also use a spreadsheet. If you have Excel I can help you to use it. Either way you can then use your graph to answer the questions in part 1 where Y = 0 and Y=1 and just read off the X values.

Part 2 is worded badly. It's ambiguous to say "raised by 0.5" since if you raise hydronium (= X) by 0.5, the change in pH (=Y) will vary depending on where you start. They meant "raise to 0.5", though they do say this at the end of the question. Anyway, you can easily read it off your graph using 0.5 as the X value.

Now to set up the exponential function this is much easier than it sounds. Just remember that a logarithm is the inverse of an exponent so they cancel each other out:  As an example log(10X) = X.

So applying here, just take this equation  Y = -log(X) and raise 10 to both sides of the equation:

10Y = 10-log(X)    which gives you 10Y = 1/X or more usefully X = 10-Y where again X= hydronium and Y = pH

Part 3, these questions actually have no relationship to anything in chemical reality, but are just exercises to see if you can manipulate the graph and function. But they do illustrate at least one interesting point. Note that in the equation

X = 10-Y

X can never =0. This makes sense since there is nothing you can raise 10 to that will make it zero. It also makes sense chemically since in water you can never have zero hydronium. Similarly using the other form

Y = -log(X)

You know X can also never be zero since you can't have log(0).

Now when they ask for a "Y intercept" they are asking for when X=0 which as stated is never in the above case. However when you transform the equation the ways they want you to, then maybe sometimes you can:

So for p(t) + 1 that really means Y = -log(x) + 1.  Still here you can not have a Y intercept (X can't =0) since you would still have log(0) which is forbidden.

But p(t+1) really means Y = -log(X+1). Here of course X can be zero since that just gives you log(1). So you have a Y-intercept.

I'll leave it for you to figure out the third one, the question being if you set X=0, will you get log(0)? If so, that's forbidden. If not, you will have a Y intercept.

5 0
2 years ago
Please help will mark brainliest if correct
sesenic [268]

Answer:

Step-by-step explanation:

<u><em>The triangles can not be proven congruent.</em></u>

We have AAA theorem ⇒ given triangles are similar for sure.

3 0
3 years ago
Helppp pleaseee
Oliga [24]
B.28 Years Hope it help
7 0
3 years ago
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