1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
slamgirl [31]
2 years ago
12

I need help on this please​

Mathematics
2 answers:
ollegr [7]2 years ago
5 0

Answer:

C
You have to use radius not the diameter

allsm [11]2 years ago
5 0
The answer I believe is “A”
You might be interested in
A girl is on the beach and the angle of elevation from her feet to the top of a lighthouse is 62' If the lighthouse is 30ft tall
soldi70 [24.7K]

Answer:

15.95 feets

Step-by-step explanation:

Given that:

Angle of elevation = 62°

Using trigonometric relation :

Tanθ = opposite / Adjacent

From the drawing attached :

Opposite = 30 feets

Distance between girl and lighthouse = d

Tan 62 = 30 / d

1.8807264 * d = 30

d = 30 / 1.8807264

d = 15.951283

d = 15.95 feets

3 0
3 years ago
What is the standard deviation of the data set given below?<br> 4,7, 8, 9, 12
larisa [96]

Answer:

I think 7

Step-by-step explanation:

4 , 8 , 9 and 12 has factors.

7 has no factor.

4= 2×2

8= 2×4

9= 3×3

12= 3×4

3 0
3 years ago
Can anyone help me solve these linear systems using substitution?
Andre45 [30]

Answer:

1. (2,2)

2. (-20, -1)

3. (4,3)

Step-by-step explanation:

See attached images

4 0
1 year ago
Read 2 more answers
Which expression is equivalent to 7z + 7z?
Ierofanga [76]

Answer:

14z

Step-by-step explanation:

Since these are like-terms, they can be added together.

7z + 7z = 14z

6 0
2 years ago
use the formulas for lowering powers to rewrite the expression in terms of the first power of cosine cos^4
Firdavs [7]

The expression cos⁴ θ in terms of the first power of cosine is <u>[ 3 + 2cos 2θ + cos 4θ]/8.</u>

The power-reducing formula, for cosine, is,

cos² θ = (1/2)[1 + cos 2θ].

In the question, we are asked to use the formulas for lowering powers to rewrite the expression in terms of the first power of cosine cos⁴ θ.

We can do it as follows:

cos⁴ θ

= (cos² θ)²

= {(1/2)[1 + cos 2θ]}²

= (1/4)[1 + cos 2θ]²

= (1/4)(1 + 2cos 2θ + cos² 2θ] {Using (a + b)² = a² + 2ab + b²}

= 1/4 + (1/2)cos 2θ + (1/4)(cos ² 2θ)

= 1/4 + (1/2)cos 2θ + (1/4)(1/2)[1 + cos 4θ]

= 1/4 + cos 2θ/4 + 1/8 + cos 4θ/8

= 3/8 + cos 2θ/4 + cos 4θ/8

= [ 3 + 2cos 2θ + cos 4θ]/8.

Thus, the expression cos⁴ θ in terms of the first power of cosine is <u>[ 3 + 2cos 2θ + cos 4θ]/8</u>.

Learn more about reducing trigonometric powers at

brainly.com/question/15202536

#SPJ4

5 0
2 years ago
Other questions:
  • work out the circumference of this circle take pie to be 3.142and give your number to 1 decimal place and the radius is 11.2cm
    15·2 answers
  • Jamie says the value of the expression 1.43 ×(-24/47) is close to −0.75. Does Jamie's estimate seem reasonable? Explain.
    7·1 answer
  • Keith ran in a marathon. itt took him 3 hours and 2 minutes to run 26 miles. If he ran at the same rate for the whole race , how
    10·1 answer
  • NEED HELP NOW
    7·1 answer
  •         Three single-digit numbers multiply to make 504          Write the missing numbers
    10·2 answers
  • How is y=1/2x+3 and 2y=x+6 equivalent?
    10·2 answers
  • What is the value of x?
    10·1 answer
  • In 2006, 67.7 million people subscribed to cable television. In 2013, that number had decreased to 56.7 million. Find the percen
    10·1 answer
  • Hi i need some help on this it will really help
    11·2 answers
  • If you flip a coin 200 times, approximately how many times will it land heads up?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!