The roots are 1, 1 again, and -5
We know that to angle A coresponding side a and to angle B corespond side b so there given that to angle A with measure of 30 degree corespond the side length of side a = 2 but from this given details that side b has length equal 2 so from this reasult that the measure of angle B is equal 30 degrees too same with angle A
If the volume of the river is 150000 kilolitres and 45% is evaporating every month then after 4.5 months there will be 15000 kilolitres and it will take approximately 42 months to completely dry up.
Given that the volume of the river is 150000 kilolitres and the water is decreasing at a rate of 45%.
We are required to find the number of months after which the water left in the river will be 15000 kilolitres and the number of months after which the river will be completely dried up.
The amount of water left after n years can be written as:
=150000*
When the volume will be 15000 kilolitres.
15000=150000*
0.1=
=
By comparing both sides we will get n=4.5.
Now put the amount of volume be 0.
0=150000*
=
By equating both sides we will get n=42. We know that 0.55 to the power anything will not give 0 but we have taken nearest value to 0.
Thus the lake will take 42 months to completely dried up.
Hence if the volume of the river is 150000 kilolitres and 45% is evaporating every month then after 4.5 months there will be 15000 kilolitres and it will take approximately 42 months to completely dry up.
Learn more about volume at brainly.com/question/463363
#SPJ9
An expansion means the image gets larger, so the scale factor has to be larger than 1.
The sign of the number ( either positive or negative) doesn't affect the scale, so to find the scale for an enlargement you can ignore the negative sign.
This would give you two numbers larger than 1, both -8 and 7 would be the correct scale factors.