![\left( \sqrt{x^{-3}} \right)^5 = \left( \sqrt{ \frac{1}{x^3} } \right)^5= \frac{1}{ (\sqrt{x^3})^5 } = \frac{1}{ \sqrt{x^{15}} } = \frac{1}{x^7 \sqrt{x} }](https://tex.z-dn.net/?f=%5Cleft%28%20%5Csqrt%7Bx%5E%7B-3%7D%7D%20%5Cright%29%5E5%20%3D%20%20%5Cleft%28%20%5Csqrt%7B%20%5Cfrac%7B1%7D%7Bx%5E3%7D%20%7D%20%5Cright%29%5E5%3D%20%5Cfrac%7B1%7D%7B%20%28%5Csqrt%7Bx%5E3%7D%29%5E5%20%7D%20%3D%20%5Cfrac%7B1%7D%7B%20%5Csqrt%7Bx%5E%7B15%7D%7D%20%7D%20%3D%20%5Cfrac%7B1%7D%7Bx%5E7%20%5Csqrt%7Bx%7D%20%7D%20)
<span>Explanation for the last step:</span>
Answer: -8
Step-by-step explanation:
Answer:
He walks 28 blocks.
Step-by-step explanation:
0,0 to 0,8 is 8 blocks
0,8 to 6,8 is 6 blocks
6,8 to 6,0 is 8 blocks
returning home (6,0 to 0,0) is 6 blocks
8+6+8+6=28 blocks
The way Maria calculates the final price of the book is correct. We know that the book normally sells for $26.50 plus a 10% sales tax. We also know that the students will receive an additional 25% discount. We must understand that the sales tax is applied to the discounted price. So first we will calculate 25% of 26.50 and subtract it from that amount. So the price will then be: (26.50 - 6.625). The price is now $18.34. Then to calculate the tax, it will be (10% * 18.34), so 1.834. We add this amount to the discounted price so: (18.34+1.834) = 20.12.
The final price of the book is $20.12 and Maria can get it and still save a little money