1. sandy's clothing shop has a markup of 45% on dresses. how much will sandy charge for a dress that costs the shop $48? 2. during todd's junior year in high school, he read 15 books. in his senior year, he read 18 books. find the percent of change. is it an increase or decrease? 3. the computer store pays $250 for each flat screen monitor. the store uses a 30% markup. what is the selling price for the flat screen monitor?

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