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ella [17]
3 years ago
14

A scientist will be measuring the total amount of leaf litter in a random sample (n = 5) of forest sites selected without replac

ement from a population of 45 sites. The sites are labeled 01, 02, . . . , 45 and she starts at the beginning of the line of random digits and takes consecutive pairs of digits. Which of the following is correct?
Mathematics
1 answer:
yulyashka [42]3 years ago
6 0
Eighty five and one twin
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Prove, Cosec2A + cot2A = cotA​
elena-s [515]

Proved

Step-by-step explanation:

Cosec2A + cot2A = cotA​

On Left hand-side

Cosec2A + cot2A = \frac{1}{sin2A} +\frac{cos2A}{sin2A} \\\\\\

=\frac{1}{2sinAcosA} +\frac{2cos^2A-1}{2sinAcosA}

\frac{1+2cos^2A-1}{2sinAcosA} \\\\\\=\frac{2cos^22A}{2sinAcosA} \\\\=\frac{cosA}{sinA} \\\\\\=cotA

Learn More

Trigonometric ratios: brainly.com/question/12462203

Keywords: Trigonometeric

#LearnwithBrainly

8 0
3 years ago
Can anyone answer this question???
Leona [35]

Answer:

E = 216 joules

Step-by-step explanation:

The given equation is

E = \frac{m*v^{2} }{2}                ............(i)

Here

m = 3 kg

v = 12 m/s

Putting the given values in equation (i)

E = \frac{3*12^{2} }{2}

E = \frac{3*144}{2}

E = \frac{432}{2}

E = 216 kg m² /s²

or

E = 216 joules

6 0
3 years ago
What is 780 in scientific notation?
Yuki888 [10]
Scientific notation is
x*10^y such that
1<u><</u>x<10

780=7.8 times 100=7.8 times 10^2

7.8*10^2
4 0
4 years ago
Read 2 more answers
Please help this makes no sense
kirill115 [55]

Answer:

121 1/4

Step-by-step explanation:

The stock market went up 30 1/2 points, then down 90 3/4 points. The total change is equal tor 121 1/4.

6 0
3 years ago
The wingspan of a airplane is 108 feet. On a scale madel of the airplane, the wingspan is 3 feet. What is the scale factor
GREYUIT [131]
Airplane wing span ÷ Model wing span

108 /3 = 36/1

The scale factor is 36 to 1.
4 0
3 years ago
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