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eimsori [14]
3 years ago
7

find the total length of guy wire needed to secure both sides of a 25ft TV antenna to a flat roof there is a 30 degree angle bet

ween the Mast and the guy wires. round to nearest hundredth.
Mathematics
1 answer:
a_sh-v [17]3 years ago
4 0
So we are looking at three times the hypotenuse of a right triangle with an acute angle of 30 degrees, and the longer leg 25'.
Each guy wire is therefore 25'/cos(30)=28.8675'
Most antenna have (minimum) three guy wires for stability, so total length
L=3*28.8675=866.03 m.

If the diagram shows other than 3 guy wires, multiply 28.8675 by the appropriate number accordingly.
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you invest $2,000 in a stock plan and another $2,000 in a savings account the stock plan decreases 7% the first year and gains 1
Dahasolnce [82]
After calculating the stock and savings account total I found out that the difference in earning between them is $104.738.
8 0
3 years ago
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At the moment a hot cake is put in a cooler, the difference between the cake's and the cooler's temperature is 50° Celsius. This
dybincka [34]

Answer:

D(t)=50(0.8)^t

Step-by-step explanation:

We are given that

Initially the difference between the cake's and the cooler's temperature ,a=50 degree Celsius

r=\frac{1}{5}/min

We have to find the function that gives the temperature difference in degrees Celsius D(t).

We know that

D(t)=a(1-r)^t

Substitute the values

D(t)=50(1-\frac{1}{5})^t=50(1-0.2)^t

D(t)=50(0.8)^t

This is required function that gives the temperature difference in degrees Celsius.

6 0
3 years ago
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The line defined by the equation 2y+3=-(2/3)(x-3) is tangent to the graph of g(x) at x=-3. What is the value of the limit as x a
Otrada [13]
<span>the limit as x approaches -3 of [g(x)-g(-3)]over(x+3) is the same as the derivative, or slope, of g(x) at the point x=-3, or g'(-3).
Since you are given the equation of the tangent line, the answer is just the slope of that line.
</span><span>2y+3=-(2/3)(x-3)
</span><span>6y+9=-2(x-3)
6y+9=-2x+6
6y=-2x-3
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8 0
3 years ago
Evaluate the function for the given values of x.
galben [10]

Answer:

g(3) = 11

g(-3) = 16

g(-1) =3

Step-by-step explanation:

For g(3)

g(x)= x² +2

g(3) = 3² + 2

g(3) = 9+2

g(3) = 11

For g(-3)

g(x) = -3x + 7

g(-3) = -3(-3) + 7

g(-3) = 9 + 7

g(-3) = 16

For g(-1)

g(x) = x² + 2

g(-1) = (-1)² +2

g(-1) = 1+2

g(-1) =3

6 0
3 years ago
Lots of points help me! its math 9th grade
77julia77 [94]
I think the answers would be B) 17
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3 years ago
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