Tutors Answer Your Questions about Exponents (FREE)
Question 154072: One common use of positive and negative exponents is in writing numbers as scientific notation. For example 0.000052 can be written as 5.2 „e 10-5. A) Use scientific notation and the laws of exponents to evaluate (0.000054)(0.00000033)(0.013). Leave your answer in scientific notation. B) If a space probe travels at 12 kilometers per second for 10 years, how far will it travel? Write your answer in scientific notation. (Assume 1 year = 365 days)
Click here to see answer by Alan3354(69443)   |
Question 154316: 7. One common use of positive and negative exponents is in writing numbers as scientific notation. For example 0.000052 can be written as 5.2 ´ 10-5. A) Use scientific notation and the laws of exponents to evaluate (0.0075)(0.0000002)(0.001). Leave your answer in scientific notation. B) If a space probe travels at 40000 kilometers per hour for 1 year, how far will it travel? Write your answer in scientific notation. (Assume 1 year = 365 days)Scientific Notation: A number is expressed in scientific notation when it is in the form a x 10n, where a is greater than or equal to 1 but less than 10 and n is an integer.
this is my school problem. I need to see this written out in order to comprehend what to do next time a problem like this comes around. Thank you.
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Click here to see answer by stanbon(75887) |
Question 154315: 6. For a holiday party, Marcus is making a seven-layer torte, which consists of seven 9-inch diameter cake layers with a cream topping on each layer. He knows that one recipe of cream will cover 65 square inches of cake. How many batches of the topping must he make to complete his torte? (Use p = 3.14 as an approximate value)
thank you most graciously for your answers.
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Click here to see answer by checkley77(12844) |
Question 154313: 5. A concrete driveway measures 18 yards by 4 yards. The driveway will be 0.5 yards thick. (a) How many cubic yards of concrete will be needed? (b) How much will it cost if concrete is $3.50 per cubic yard?
Any and all help is greatly appreciated. Thank you.
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Click here to see answer by checkley77(12844) |
Question 154310: 2. A square support unit in a television is made with a side measuring 3 centimeters. A new model being designed for the upcoming year will have a larger square with a side measuring 3.2 centimeters. By how much will the area of the square be increased?
Thank you for your help, it is greatly appreciated.
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Click here to see answer by checkley77(12844) |
Question 154308: 1. A semicircular window of radius 15 inches is to be laminated with a sunblock coating that costs $0.85 per square inch to apply. What is the total cost of coating the window, to the nearest cent? (Use p = 3.14. Hint: Area of Circle: A = pr²)
Thank you for your help. If you could lay it our for me, I'd appreciate it.
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Click here to see answer by checkley77(12844) |
Question 154476: The expression goes as this:
(3x^-4 y2)^-3
I need to write this WITHOUT negative exponents. Now I know how to get just so far, as in : x^–2" just means x2, but underneath, as in 1/(x2), yet I cannot come up with the necessary 'perfect' result. Can you please explain this to me and let me see what you've got as the correct answer to my inquiry? Thank so much.
once again: without negative exponents, I need to write: (3x^-4 y2)^-3
Click here to see answer by checkley77(12844) |
Question 154604: The question in my homework is:
Write the answer using positive exponents only
[2x5y^-4/3y^-2]^2
I know I need to flip to make them positive but have been wracking my brain trying to figure out where to go from there
Click here to see answer by edjones(8007)  |
Question 155766: Hi, I am having trouble with my monomials adding and subtracting and multiplying. For example, -8x to the 5th power y to the 5th power +(-5x to the 5th power y to the 5th power. I dont know how to do exponents.
Click here to see answer by stanbon(75887) |
Question 155766: Hi, I am having trouble with my monomials adding and subtracting and multiplying. For example, -8x to the 5th power y to the 5th power +(-5x to the 5th power y to the 5th power. I dont know how to do exponents.
Click here to see answer by Earlsdon(6294) |
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