5. BONUS: Mathematical Operations and Functions
Power and Root Functions -
Video duration:
1mRelated Videos
Skip to main content
So here it says, use the method discussed above to determine the answer to the following question. So here we have 7.5 times 10 to the -three taken to the 5th power times the 4th root of 8.6 times 10 to the 21 and we're going to see what our answer is. Now what you should do is you should do parenthesis 7.5x10-three and then you raise it to the 5th power. If you do that correctly what you should get initially is 2.3730 0 five times ten to the negative 11. Check to see you got the same answer that I did. Times, remember this here is the same thing as saying 8.6x101 in parenthesis, taken to the one fourth power. Remember, 4th root is the same thing as one fourth power. So if we take this to the one fourth power what you should get at the end is 304526. Then we multiply those two numbers together. And remember here, when you're multiplying or dividing, the number of significant figures is the lowest. Right? So this coefficient here has 2 sig figs that, this coefficient here has 2 sig figs or answer at the end must have 2 sig figs. So what you get here is 7.2 times 10 to the negative 6. So input that answer, input these numbers into your calculator and see if you get the same exact answer that I got at the end. Again, you may be able to write things down correctly on paper, but if you're struggling and punching it into your calculator, then you'll you won't ever get the correct answer. So keep practicing when it comes to inputting these values into whatever calculator model that you are using.
04:42
