**Answer:**

We can make 48 cookies.

**Step-by-step explanation:**

**60 percent of 120 = 72**

**120 - 72 = 48**

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**Step-by-step explanation:**

If it looks like this

y = 161*(0.725)^t then it's a decay. Reason: the base is under 1. Try a couple of values for t say 0,1,2

y = 161 * (0.725)^0

y = 161

y = 161 * (0.725)^1

y = 161 * 0.725

y = 116.7

y = 161 * (0.725)^2

y = 161 * (0.5256

y = 84.63

You can see that the function is steadily getting smaller. Remember if the base is under 1 and more than 0 the function decays. If it is greater than 1 then the function grows.

Just to make sure we understand what I'm saying

0 < base < 1

y = a ( base)^power.

**Step-by-step explanation:**

zidufhehkcsyjodbjd r

Answer:390

Step-by-step explanation:

130% of a=507

130/100 x a=507

13/10 x a=507

13a/10=507

Cross multiplying we get

13a=507x10

13a=5070

Divide both sides by 13

13a ➗ 13=5070 ➗ 13

a=390