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puteri [66]
3 years ago
14

Explain why sin(90)=1

Mathematics
1 answer:
DENIUS [597]3 years ago
4 0
<em>In a right triangle, sin=</em><u><em /></u><em />\frac{opposite  segment}{hypotenuse}
<em>Because the "opposite segment " is actually the hypotenuse of the triangle we get the fraction</em> \frac{hypotenuse}{hypotenuse} <em>which is <u>1.</u></em>
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What is the approximate surface area of the sphere if circumference is 37.68?
damaskus [11]

The surface area of a sphere is  A = 4 π R² .

Sadly, the question doesn't give you 'R', so you have to
back it out of the circumference.

                           Circumference = π (diameter)

Divide each side by π :  Diameter = circumference / π

Radius = 1/2 diameter:  Radius = circumference / (2 π)

                                       Area = 4 π R²  =

                                                 4 π (circumference/2π)² =

                                                 4 π (circumference)² / 4 π²

Divide top and bottom by  4π :  Area = (Circumference)² / π

         Circumference = 37.68 units

         Area =  (37.68)² square units /π =
    
                       <em>451.93 square units</em>


8 0
3 years ago
PLEASE HELP!!!!!! URGENT!!
Stolb23 [73]

Answer: the answer is 76 please give me brainliest im trying to rank up.

6 0
3 years ago
Sara hiked down a mountain for 4 hours. Each hour her elevation decreased by 8 meters. Compute her change in elevation to her st
Fittoniya [83]
In order for me to figure out the answer I need the "starting point" all I get from this is how much she decreased in total, which is 32.
5 0
3 years ago
Rachel has $9 in a savings account. The interest rate is 5%, compounded annually.
pogonyaev
1 % of 9 is 0.09, multiply 0.09 by 5= 0.45 (to find 5%)
Then multiply 0.45 by 36 (3years)= 16.20
Then add 16.20 to $9= $25.20
7 0
3 years ago
Complete the equation of the line through<br> (-6, -5) and (-4,-4).<br> Use exact numbers.
Nutka1998 [239]

Answer:

y = \frac{1}{2} x - 2

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (- 6, - 5) and (x₂, y₂ ) = (- 4, - 4)

m = \frac{-4+5}{-4+6} = \frac{1}{2}, thus

y = \frac{1}{2} x + c ← is the partial equation

To find c substitute either of the 2 points into the partial equation

Using (- 6, - 5), then

- 5 = - 3 + c ⇒ c = - 5 + 3 = - 2

y = \frac{1}{2} x - 2 ← equation of line

7 0
3 years ago
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