What is one disadvantage of using wind energy rather than burning coal to produce electricity a: the power it produces is economical b: wind energy can be converted directly into electricity c: the turbines are too large d: it does not cause pollution?

C) The turbines are too large

Step-by-step explanation:

The question is what is the disadvantage of wind energy over burning coal.  A) is not a disadvantage B) is not a disadvantage D) is not a disadvantage, however, C) is a disadvantage.

Wind power, where suitable amount of wind is available, is economical, it can be converted directly into energy and does not cause any pollution.  These are all advantages over burning coal.  However, turbines are large, and depending on the amount of electricity needed, can require large amounts of space and or land to accommodate the number of turbines needed

Coal, is not a renewable resource making it a limited supply which makes it less economical and sustainable.  It has to be burned in order to generate and be turned into electricity, which causes pollution.

The only disadvantage to wind energy is that the turbines are very large and require a large amount of space in order to collect enough kinetic energy to convert to electrical

geometric series converge the common ratio r has magnitude less than one.

which is equivalent to

for the example we need

|2-x| < 1

-1 < 2-x   and 2-x < 1

x < 3 and x > 1

we can write that

answer: 1 < x < 3

1a. common ratio r=250/25=10 > 1     diverges

1b.   r=50/100=1/2 converges

when these converge they converge to

where a is the first term.

answer: 200

1c. r=-1   so it's not the case that |r| < 1.     diverges

2a. x is the common ratio so we converge when |x|< 1

2b.   r=-10x / -2 = 5x.

we converge when

|5x| < 1

|x| < 1/5

2c.   r=3-2x

-1 < 3-2x and 3-2x < 1

-4 < -2x and 2 < 2x

x < 2 and 1 < x

1 < x < 2

2d. [/tex] r=-48x^3/12 = 4x^3[/tex]

|4x^3| < 1

|x^3| < \frac 1 4

|x| < 4^{-1/3}

proofs involving isosceles triangles often require special consideration because an isosceles triangle has several distinct properties that do not apply to normal triangles.(more about triangle types) therefore, when you are trying to prove that two triangles are congruent, and one or both triangles, are isosceles you have a few theorems that you can use to make your life easier.

step-by-step explanation:

an isosceles triangle has two congruent sides and two congruent angles. the congruent angles are called the base angles and the other angle is known as the vertex angle. ∠bac and ∠bca are the base angles of the triangle picture on the left. the vertex angle is ∠abc