Answer:
The final net price of a designer swimsuit is 
Step-by-step explanation:
Let
x-----> the final net price of a designer swimsuit
we know that
![x=\$85[1-\frac{25}{60}]](https://tex.z-dn.net/?f=x%3D%5C%2485%5B1-%5Cfrac%7B25%7D%7B60%7D%5D)
![x=\$85[\frac{35}{60}]](https://tex.z-dn.net/?f=x%3D%5C%2485%5B%5Cfrac%7B35%7D%7B60%7D%5D)
The best thing to do is to find the cost of one sweet, and to do this, divide 42 by 7.
42/7= 6
Therefore, one sweet costs 6p.
To find the cost of 8 sweets, you've got to multiply 6 by 8, and this gives you 54p.
Therefore, 8 sweets cost 54p
This is basically just finding unit rate and multiplying.
<span>Hope this helps :)</span>
The change is decay and the percentage rate of decrease will be 95%.
An exponential function is a function where a number is raised to the variable i.e. base is raised to the exponent times.
Here given the exponential function is y= 4300(0.042)ˣ
Now we have to identify if the change in exponential function represents growth or decay, and have to determine the percentage rate of increase or decrease.
Here in the exponential function, the base is less than 1 so the change is decay.
The equation represents exponential decay because the decay factor is lesser than 1.
The general form of the exponential equation is:
y(x)= a(1-r)ˣ such that r is the decay.
equating with the equation
y= 4300(0.042)ˣ
a= 4300
and 1-r=0.042
⇒r= 1-0.042
⇒r= 0.958
the perecentage of decay will be r*100= 0.958*100= 95%
Therefore the change is decay and the percentage rate of decrease will be 95%.
Learn more about exponential function
here: brainly.com/question/2046253
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