Your fuel expense for last year was $800 this year it was $960 what was the percentage of increase. a.23% b.18% c. 15% d.20%

The percentage of increase in fuel expenses is 20%

Step-by-step explanation:

Given:

Fuel expense in last year =  $800

Fuel expense in this year =  $960

To Find:

The percentage of increase

Solution:

Let the percentage increase be X

Then X  =

Now substituting the values we get,

X= 20%

ok

step-by-step explanation:

x =-.20752

step-by-step explanation:

4^(x+2)=12

4^(x+2)=12

take the log base 4 on each side

log 4 (4^(x+2) = log 4(12)

we know log b(a^y) = y log b (a)

(x+2) log 4(4) = log 4 (12)

x+2 = log 4 (12)

we know   logb c = loga c/loga b

we want to convert to base 10   so a = 10

by default, we do not write the 10   c = 4   and b = 10

log4 10 = log 12/log 4

log4 10 = log 12/ log 4

x+2 = log 12/ log 4

subtract 2 from each side

x +2 -2 = log 12/ log 4 -2

x = 1.79248125 -2

x =-.20752