Tutors Answer Your Questions about Surface-area (FREE)
Question 832190: At her country house, Rosa has a square flower garden. She puts 200 feet of new fence all the way around the garden to keep her granddaughter, Mia, out of the garden. How many square feet of space does her garden have?
A) 160
B) 250
C) 2,500
D) 1,600
In my opinion it 1,600. Am I correct?
Click here to see answer by MathTherapy(10552)  |
Question 832246: A hemispherical wash basin has an internal diameter of 22 cm. The basin has a uniform thickness of 10 cm. What is the area of the inner and outer surfaces of the wash basin? Answer in square centimetres correct to four significant figures.
Please show working out
Click here to see answer by rothauserc(4718)  |
Question 833829: If the length of a rectangle is three times the width, W, what is the perimeter of the rectangle in terms of W?
(A) 2 (3+W)
(B) 4 (3+W)
(C) 3W
(D) 4W
(E) 8W
My answer key says the answer is (E), but I don't understand how you get the answer. Please help me!
Click here to see answer by LinnW(1048)  |
Question 837626: I have a problem: For a world Peace day celebration the students at cabot high school are making a 6 m by 8 m flag. Each of the six grades will create a motif to honor the people of the six inhabited continets. Sketch three possible ways to divide the flag. One into six congruent triangles; one into sixs triangles with equal area but none congruent; and one into six congruent trapezoids. Give measuresments or makings on your sketches so each class knows it has equal area
Click here to see answer by KMST(5328)  |
Question 838479: I feel so lost and hope I'm doing at least some of this right, can someone show me where I am messing up?
Consider a circle of radius 1, and corresponding circumscribed polygons with the number of sides n = 3, 4, and 6. Drawing a diagram will be extremely helpful.
A: For each n = 3, 4, and 6 what are the areas of the circumscribed polygons with n sides? You must show your work.
B: Both areas approach a limiting value as n gets larger and larger. What number would this be and why?
C: For each n = 3, 4, and 6 what are the perimeters of the circumscribed polygons with n sides? Show your work.
D: The perimeter approaches a limiting value as n gets larger and larger. What number would this be and why?
This is what I have so far:
A:
3 area of circumscribed polygon with n sides is 1/2AP=1/2(1)(6 sqrt3)= 3 sqrt3~ 5.2
4 area of circumscribed polygon with n sides is 2x2=4
6 area of circumscribed polygon with n sides is 1/2AP = 1/2(1)(12/sqrt3)=6/sqrt3~3.5
B:
Area approaches the area of the circle of radius one: π
C:
3 Perimeter of circumscribed polygon with n sides is 2sqrt3 so 6sqrt3 ~ 10.4
4 each side has length 2, so 8
6 each side has length 2/sqrt3 1 so 12/sqrt3~6.9
D:
The area approaches the circumference of the circle of radius one: 2π
Any help would be very much appreciated!
Click here to see answer by edjones(8007)  |
Question 838142: step 1: 30/π∫ max: 2 min: 0) (π/6)*sec((πx)/6)dx = 30/π(ln|sec((xπ)/6)+tan((xπi)/6)|] (max: 2 min: 0)
step 2: = 30/π(ln|sec((π)/__?__)+tan((π)/__?__)| - ln|1+0|]
step 3: = (30/π)ln(__?__+sqrt(__?__))
step 4: = __?__ (rounded to three decimal places)
step 5: Thus the area of the bounded region is approximately __?__ (rounded to three decimal places).
Can you please tell me what to put where it reads __?__
Click here to see answer by KMST(5328)  |
Question 838979: Two circles of equal radius r cm, such that the centre of each circle lies on the circumference of the other one.
Given that sin60=(√3)/2, find an expression for the total area enclosed within the two circles.
My notes:
I have split the area needed to find into 4 right angled triangles and 4 chords. I can find the area of the combined area of 1 chord and 2 of these triangles. But I have no clue how to work out the final 2 chords area and get the answer. Look forward to hearing from you.
Click here to see answer by Alan3354(69443)  |
Question 839842: The fourth rectangular prism has the following characteristics:
-Has a volume of 360 cubic inches
-Two of the dimensions are consecutive numbers
-All the dimensions are less than 10 but greater than 4
-All the dimensions are different
-The sume of the three dimensions is 22
-One of the dimensions is 8
What are the dimensions of the rectangular prism?
Thanks so much for helping us with this problem! We are really struggling with it!
Kim
robkimkc@yahoo.com
Click here to see answer by richard1234(7193)  |
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Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840
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