Tutors Answer Your Questions about Radicals (FREE)
Question 299122: A rectangular dance floor measures 24 feet by 32 feet. The length and width of the floor will both be increased by x feet. Write an equation that can be used to determine the value of x, in feet, if the area of the new dance floor is 1,174.25 square feet.
What are the dimensions of the new dance floor, in feet, if the area is 1,174.25 square feet?
Click here to see answer by checkley77(12844)  |
Question 301130: Hello. I am struggling with this equation - (2√7+3)(3√7-4) I know that we are supposed to FOIL so when I worked the problem this is what I got 6√7-8√7+9√7-12 cant be the right method because the book says the answer is 30+√7. Can someone tell me what I'm doing wrong? Thanks in advance :)
Click here to see answer by jim_thompson5910(35256) |
Question 301130: Hello. I am struggling with this equation - (2√7+3)(3√7-4) I know that we are supposed to FOIL so when I worked the problem this is what I got 6√7-8√7+9√7-12 cant be the right method because the book says the answer is 30+√7. Can someone tell me what I'm doing wrong? Thanks in advance :)
Click here to see answer by ankor@dixie-net.com(22740)  |
Question 301392: At a height of h meters, you can see V kilometers to the horizon. These numbers are related to the formula v=3.5 . How far can a sailor see to the horizon from the top of a mass that is 45 m high?
Round to the nearest whole number.
Would the answer be 23 feet?
Click here to see answer by solver91311(24713)  |
Question 301396: Using the formula L= 0.000169d^2.27/h, where L is the proper length in feet of the letters painted on the pavement. D is the distance in feet from the car to the lettering, and h is the height in feet from the eye of the road. Find the height l of a road-pavement message when H=4ft and D=200 ft.
Round to the nearest tenth of a foot.
Would the answer be 7.1 feet?
Click here to see answer by checkley77(12844) |
Question 301716: I am struggling with radical expressions.
So here is the problem:
1.Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on Earth also varies according to the elevation of the object? In particular, the weight of an object follows this equation: w = Cr^-2 , where C is a constant, and r is the distance that the object is from the center of Earth.
a.Solve the equation w = Cr^-2,for r.
I tried it on my own, but I am not sure if I did it correctly. Here is what I got:
w/C = r^-2
r=2√(w/C)
Now I am not sure how to type the radcial correctly but the 2 is being multiplied by the radical. It is supposed to be one of those miniture numbers at the top of the radical. Gosh I hope this makes since, I couldn't get it to copy and past correctly.
I appreciate any assistance you can provide,
Taylor
Click here to see answer by richwmiller(17219)  |
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