The average cost of a gallon of gas during july was $2.45. the average cost of a gallon of gas during august was $2.78. what is the percent of change in the average cost of a gallon of gas from july to august?

Step One

Figure out the actual change.

Change = 2.78 - 2.45

Change = 0.33

Step 2

Find the % change

% Change = 0.33/2.45 * 100 = 13.5%

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,

find the magnitude of the trig term  

csc

(

x

)

−

1

by taking the absolute value of the coefficient.

1

find the lower bound of the range.

tap for more

y

=

−

2

find the upper bound of the range.

tap for more

y

=

0

the range is  

y

≤

−

2

or  

y

≥

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(

−

∞

,

−

2

]

∪

[

0

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∞

)

{

y

|

y

≤

−

2

,

y

≥

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}

step-by-step explanation: