Answer:
-12 3/5
Step-by-step explanation:
-4 3/10 - 8 3/10
The signs are the same so we add and then take the sign
4 3/10 + 8 3/10
Add the whole numbers
4+8 = 12
Add the fractions
3/10 + 3/10 = 6/10
Simplify the fraction
6/10 = 3/5
Put them together
12 3/5
Add the sign
-12 3/5
The answer is 28 %, this is the percent of the class with blue eyes.
Six squared plus four equals 40
6^2+4=40
Using an exponential function, it is found that the value of the function when x = 4 is of f(4) = 15.95.
<h3>What is an exponential function?</h3>
It is modeled by:

In which:
- b is the rate of change, as a decimal.
In this problem, we have that f(-1)=5, hence:


a = 5b
We also have that f(7)=32, hence:

Since a = 5b:

![b = \sqrt[8]{\frac{32}{5}}](https://tex.z-dn.net/?f=b%20%3D%20%5Csqrt%5B8%5D%7B%5Cfrac%7B32%7D%7B5%7D%7D)
b = 1.2612.
a = 5b = 5 x 1.2612 = 6.306.
Hence the function is given by:

Then, when x = 4, we have that:

More can be learned about exponential functions at brainly.com/question/25537936
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