Answer:
10.5 percents
Step-by-step explanation:
1)100+30=130 percents;
2) 130/100*15=19.5percents of discount from the first price
3) 130-19.5=110.5 percents- new price from the initial price
4)110.5-100=10.5 percents - the percentage of profit
x>6
*math work*
A=1/2h(a+b)
1/2h(a+b)=A
h(a+b)=2A
h=2A/(a+b)
Option b
