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Darya [45]
2 years ago
15

a tree casts a shadow that is 20 ft long. the angle of elevation of the sun is 29°. how tall is the tree?

Mathematics
1 answer:
mars1129 [50]2 years ago
3 0
You can use the trig ratios. Draw a diagram to see which one is appropriate. 
Tan would be used.
Tan29=x/20
20Tan29=x
Put this into your calculator and see what you get
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What's -1.55 as a fraction? show work please help
expeople1 [14]

Answer:

hope it's help you dear

Step-by-step explanation:

The decimal part of your number seems to have the repeating digit 5 in it.

Your original number to convert is 1.550000. Let's slide the decimal point in this number to the right 1 place(s) (the same number of digits in the number 5).

If we do this, we'll get a 15.500000 (slide the decimal in the 1.550000 right 1 places, you'll get 15.500000).

So what? Well now, we have two numbers with the same repeating decimal parts, 15.500000 and 1.550000.

Now let's just work a little algebra into all of this. Let's call your original number x. And in this case, x=1.550000. The number with the decimal point slid over can be called 10x, because 10x=15.500000

What if we subtracted these two equations (that is, subtract the items on the left of the equal sign

from the stuff on the right of the equal sign)?

10x = 15.5

- x = 1.55

----------

9x = 13.95.

Now here's the important result of doing all of this: Notice how all of the repeating decimal parts have subtracted away to zero! We are left with a nice, simple 14 on the right side of the equal sign.

Now, solving 9x=14 for x by dividing both sides of it by 9, we'll get that x=14/9. And this is your answer.

How is this your answer? Well remember that above, x was originally set equal to 1.550000 via x=1.550000, and now we have that x is also equal to 14/9, so that means 1.550000=14/9..and there's 1.550000 written as a fraction!

The fraction is an improper fraction (the numerator is greater than the denominator).

While there is nothing incorrect about this, an improper fraction is typically

simplified further into a mixed number.

The whole number part of the mixed number is found by dividing the 14 by the 9.

In this case we get 1.

The fractional part of the mixed number is found by using the remainder of the division,

which in this case is 5 (14 divided by 9 is 1 remainder 5).

So your final answer is: 1.550000 can be written as the fraction

7 0
3 years ago
Read 2 more answers
hi i need some smart friends that are in grade 10 thats actually smart to help me i feel so embarressed to ask but anyways i act
Delicious77 [7]

334

Step-by-step explanation:

8 0
2 years ago
Katie cut out a rectangular piece of wrapping paper that was 2 times as long and 3 times as wide as the box that she was wrappin
kotegsom [21]
2*5=10 (the measure of one long side is 10)
3*4=12 (the measure of one wide side is 12)


A box has four sides to the perimeter of the flat wrapping paper must consist of four edges.  Because we know that one edge is 10 inches long and another side is 12 inches wide we assume that the corresponding sides are equal.  


So now we know that we have two sides that are 10 inches and 2 sides that are 12 inches.


10+10+12+12= 44 inches
3 0
3 years ago
3X-4 over 14 equals 9 over 10 solve for x
Maru [420]

Answer:

3x-4/14=9/10

You change the subtraction to addition

3x+4/14=9/10

Then you change the fractions to decimals

Step-by-step explanation:

8 0
3 years ago
Find the simple interest earned to the nearest cent for each principal, interest rate, and time.
Lorico [155]
Try Using the Formula I=Prt

principal×rate×time

so

P-1200
R-.039
T-8 months
4 0
3 years ago
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