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beks73 [17]
3 years ago
7

If a tree 28 meters tall casts a shadow 32 meters long, what is the angle of elevation of the sun to the nearest degree?

Mathematics
2 answers:
blagie [28]3 years ago
7 0
We need an angle measure we have to use an inverse trig ratio, sin^-1, cos^-1, or tan^-1.
Setting up the right triangle we have the opposite and adjacent so we use tan.
tan angle = 28/32
tan^-1 (28/32) = 41 degrees
zysi [14]3 years ago
4 0
Height = 28m
shadow = 32

Angle = tan^-1 (28/32) = 41.18 degree

Hope it helps!
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You can peel 4 potatoes in 10 minutes. How long will it take you to peel 14 potatoes?
Grace [21]

It would take you 35 minutes.

Since it takes 10 minutes to peel 4 potatoes, you can assume it would take 30 minutes to peel 12 potatoes (mulitiplying both numbers by 3). Then you'd add 5, instead of 10 because you are peeling 2 more potatoes than 12, instead of peeling 4, you'd divide 10 by 2 to get half the time it would take to peel half as many potatoes. Finally, add 30 and 5 to get you final answer of 35.

I hope this helps!

8 0
3 years ago
NEED ANSWERS AND EXPLANATION ASAP!!!
Elden [556K]

Answer:

see explanation

Step-by-step explanation:

(1)

Note the ratio of consecutive terms is common, that is

2000 ÷ 2500 = 0.8

1600 ÷ 2000 = 0.8

1280 ÷ 1600 = 0.8

This indicates that the series is geometric with common ratio r = 0.8

The sum to n terms of a geometric series is

S_{n} = \frac{a(1-r^n)}{1-r} ← a is the first term

Here a = 2500 and r = 0.8, thus

S_{5} = \frac{2500(1-0.8^5)}{1-0.8} = \frac{2500(0.67232)}{0.2} = 8404

(2)

Note the difference in consecutive terms is common, that is

3 - 11 = - 8

- 5 - 3 = - 8

- 13 - (- 5) = - 8

This indicates that the series is arithmetic with common difference d = - 8

The sum to n terms of an arithmetic series is

S_{n} = a₁ + (n - 1)d ← a₁ is the first term

Here a₁ = 11 and d = - 8, thus

S_{14} = 11 + (13 × - 8) = 11 - 104 = - 93

7 0
4 years ago
What is -9 and 4/5 - 4 and 3/5
olga_2 [115]
-9 and 4/5-4 and 3/5=-14 and 2/5
7 0
3 years ago
To which set or sets does the number 8 belong?
KiRa [710]
I believe it is d: whole numbers, integers, and rational numbers
6 0
3 years ago
Read 2 more answers
A​ salesperson's monthly expenses​ (in thousands of​ dollars) are exponentially​ distributed, with an average of 2.75 ​(thousand
Mrrafil [7]

Answer:

Step-by-step explanation:

Given that a salesperson's monthly expenses​ (in thousands of​ dollars) are exponentially​ distributed, with an average of 2.75 ​(thousand dollars).

Hence pdf of X is

a) f(x) = \frac{1}{2,75} e^{\frac{-x}{2.75} } \\f(x) = 0.3636e^{-0.3636t} ,t\geq 0

b)  P(X\geq 4000) = e^{-0.3636*4000} \\=0.00000\\

Almost negligible.

5 0
3 years ago
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