Find a rational number with one decimal place that is between 17√ and 18√.
We can rewrite the expressions $\sqrt{17}$ and $\sqrt{18}$ as $17^{\frac{1}{2}}$ and $18^{\frac{1}{2}}$, respectively. Since $17<18$, we have $17^{\frac{1}{2}}<18^{\frac{1}{2}}$, so $\sqrt{17}<\sqrt{18}$. Since $\sqrt{17}$ and $\sqrt{18}$ are consecutive square roots, their difference, $\sqrt{18}-\sqrt{17}$, must be less than $1$.
We want to find a rational number with one decimal place that is between $\sqrt{17}$ and $\sqrt{18}$. Recall that $\sqrt{17}<\sqrt{18}$. To find a rational number in this range, we can take the average of $\sqrt{17}$ and $\sqrt{18}$. Since these numbers have an infinite number of decimal places, their average will also have an infinite number of decimal places. However, if we round that average to one decimal place, then we will find a rational number in the desired range.
The average of $\sqrt{17}$ and $\sqrt{18}$ is $\frac{\sqrt{17}+\sqrt{18}}{2}=\frac{\sqrt{17}+\sqrt{17}\sqrt{2}}{2}=\frac{\sqrt{17}(1+\sqrt{2})}{2}=\frac{\sqrt{17(1+\sqrt{2})^2}}{2}$. We can simplify the expression under the square root: $17(1+\sqrt{2})^2=17(1+2+2\sqrt{2})=17(3+2\sqrt{2})=51+34\sqrt{2}$. Therefore, we have $\frac{\sqrt{17(1+\sqrt{2})^2}}{2}=\frac{\sqrt{51+34\sqrt{2}}}{2} \approx 4.0$.
So, a rational number with one decimal place that is between $\sqrt{17}$ and $\sqrt{18}$ is $\boxed{4.0}$.
Wrong
Apologies for the mistake. Let's correct the solution.
We know that $\sqrt{17}$ is less than $\sqrt{18}$ since $17<18$. Therefore, our rational number should be greater than $\sqrt{17}$ and less than $\sqrt{18}$.
We can find a rational number between two given numbers by taking their average. So, let's find the average of $\sqrt{17}$ and $\sqrt{18}$:
$$\frac{\sqrt{17}+\sqrt{18}}{2}$$
Since the decimal place is to one decimal place, we can round this number to one decimal place:
$$\frac{\sqrt{17}+\sqrt{18}}{2} \approx \frac{4.1+4.2}{2}= \frac{8.3}{2} = 4.15$$
Therefore, a rational number with one decimal place that is between $\sqrt{17}$ and $\sqrt{18}$ is $\boxed{4.15}$.
Still not right
Apologies for the continued mistakes. Let's correct the solution.
To find a rational number between $\sqrt{17}$ and $\sqrt{18}$, we can first find the decimal approximations of these numbers and then round to one decimal place.
Using a calculator, we find that $\sqrt{17} \approx 4.123$ and $\sqrt{18} \approx 4.243$.
Rounding these decimal approximations to one decimal place, we have $4.123 \approx 4.1$ and $4.243 \approx 4.2$.
Therefore, a rational number with one decimal place that is between $\sqrt{17}$ and $\sqrt{18}$ is $\boxed{4.2}$.
To find a rational number with one decimal place that is between 17√ and 18√, we need to approximate the values of these square roots.
Let's start by finding the values of 17√ and 18√:
√17 ≈ 4.123
√18 ≈ 4.243
Now, we can find a rational number with one decimal place between these values. Since 17√ is closer to the lower whole number, we can take the value of 17√ and add 0.1 to it:
4.123 + 0.1 = 4.223
Therefore, a rational number with one decimal place that lies between 17√ and 18√ is approximately 4.2.