Barbara reduced her monthly phone bill by 9% by switching to another phone company. If her monthly phone was $80 before the switch, how much is her monthly phone bill now? A)71.00
B) 72.00
C)72.80
D)89.00

Option C is correct

Step-by-step explanation:

Given data

The monthly phone bill was = $80

Let us first find 9% of $80

=9/100*80

=0.09*80

=$7.2

Hence the monthly bill now is

=80-7.2

=$72.80

95.03 is the answer. hope this !

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