What is the decay factor in the exponential decay function y=a(1−r)t ?

Use the decay factor 1 − r ≈ 0.989 to find the rate of decay r ≈ 0.011. So, the monthly percent decrease is about 1.1%. c. From the graph, you can see that the y-value is about 10,000 when t = 6.

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!