1. 7<x<13
The range for 1/x would be from 1/13 to 1/7, the reciprocals of 7 and 13.
answer: 1/13<1/x<1/7
2. 6<a<10 -----> -10<-a<-6 -------> -8<2-a<-4
×-1 +2
answer: -8<2-a<-4
The formula for interest compounded annually is A=P(1+(r/n)^nt.
In this context: A=50,000 r=0.036 n=1, since it's compounded annually (Once per year) and t=10.
Now plug in and solve for P.
50,000=P(1+(0.036/1)^(1 * 10)
50,000= 1.42 P (I just distributed).
Divide both sides by 1.42 to get a final answer of $35,105.28.
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Because 3c is given cookies and 36 minus baked cookies can give value of total cookies