# area, perimeter

20,276 results, page 19

### Geometry

A particular model of walkie-talkie can broadcast in a circular area. The radius of the broadcast area is 10,000 feet. Find the area of this circle to the nearest square foot. Use 3.14 for pi. A. 314,000,000 ft^2 B. 100,000,000 ft^2 C. 1,256,000,000 ft^2 D. 62,800 ft^2

### math i need help 3 questions

1. The numerator and denominator of a fraction are in the ratio of 3 to 4. If 4 is added to the numerator and subtracted from the denominator, the value of the resulting fraction is 4/3. The numerator of the original fraction is A. 12 B. C. 3 D. 4 2. If it takes b hours to ...

### Area Geometry

Find the area of a decagon with a radius of 4mm. Find the area of an octagon with a radius of 10 cm.

### Algebra

Word Problems: 1. A farmer has 2400 feet of fencing and wants to fence off a rectangular field that borders a straight river. If he needs no fence along the river, what are the dimensions of the field that he can fence with the largest area? Find the area of the field. 2. If ...

### Seventh grade math

The area of a square floor on a scale drawing is 64 square centimeters, and the scale drawing is 1 centimeter:2 ft. What is the area of the actual floor? What is the ratio of the area in the drawing to the actual area? I have been trying to answer this question forever I ...

### Grade 11 math

A uniform-width boardwalk is built around the inside edge of a rectangular parkland that is 10m by 5m. If the boardwalk takes up 20% of the lot, how wide is the boardwalk to the nearest centimetre? I have no idea what to do after figuring out that: Total area= 150m^2 Boardwalk...

### calculus

given the graph of f(x) = x sinx, 0<=x<=2pi assuming that a quantity y changes at a rate of y' = xsinx, find by how much it will increase or decrease over 3pi/2 <= x <= 2pi the area under the graph from 0 to pi/2 is 1 the area under the graph from pi/2 to pi is pi-...

### math

judy wants to fence the sides of the yard in front of her house . She bought 60m of fence and wants the max area she can fence in . The quad function a(x)=-2x^2+60x, where x is the width of the yard in metres , represent area enclosed . Determine the max area possible , ...

### Math

A rectangular garden has an area if 12a^2-5a-2m^2 A.) Write the area as the product of two binomials with integer coefficients B.) the garden is to be completely enclosed by a path 1 m wide. find and simplify an expression for the area of the path C.) the path is concrete, ...

### Calculus

Find the area between the curve y=4/x and the x-axis from x=1 to x=e. It is a review question for my final exam and I am really stuck on how to solve You should hope for a final exam question so easy. area= INT y dx= INT 4/x dx from 1 to e area= 4ln x from 1 to e

### math

The two of us ordered a pizza whose area was the same as the area of a square in which the sum of the squares of the four sides plus the sum of the squares of the two diagonals is 400. The pizza's area was A. 50 B. 100 C. 150 D. 200

### Maths

A quadrilateral is called cyclic if its corners lie on the circumference of a circle. An example is shown below left: the circle has radius 5 The area A of the quadrilateral for different x values is plotted on the right. It can be calculated that this curve has derivative: dA...

### geometry

A farmer has 30yd of fencing and wants to enclose an area beside his barn. What are the dimensions of the region of maximal area, and what is that maximal area if the region is an is isosceles triangle with its base along side of the barn. Given -> legs of length 15, x = 1/...

### earth

Suppose a geologist is studying two distinct areas next to a spreading ridge. The magnetic direction of the minerals in the oldest area is opposite to the magnetic direction of minerals in the newest area. (a) Which area is closest to the centre of the ridge, the older or ...

### math- geometry

I will try and explain this since I can't draw the picture that went with this question. A circular glass overlay was placed on the top of a circular table. Find the area of the shaded region, rounding to the nearest tenth. The shaded region is the part of the table outside of...

### Technology

Calculate the force required to move a small pistons that has an area of 2m2,if the force of a large piston is 20n with an as area of 4m2.Hint use a formulae :a frorce of small piston divided by an area of small piston equal to force of large pistone divided by area of large ...

### Triangles

Right traingles C and D share a leg. If the ratio of the area of traingle C to the area of traingle D is 5:9, C’s hypotenuse is of length 25, and D’s hypotenuse is of length 39, what is the area of C?

### Math

A rectangle has the area of 25 square feet. A similar rectangle has an area of 240 square feet. What is the ratio of the area of these similiar triangles?

### Math

I need to find the area of a shaded part. it is a square with a circle the measurements that I have are pi = 3.14 and 15 ft by 15 ft. I know to find the area of the square I take base x height but cannot figure out correct formula for subtracting the circle. To find the area ...

### Algebra

A rectangle has dimensions in feet as shown in the figure it is 2x +5 And one side is 8. I need to write an expression for the area of the rectangle. B. Find the area of the rectangle, in sq.ft. if x=3 C. Find the value of x if the area of the rectangle is 160 square feet.

### Math

What is the lateral area, total area, and volume of a rectangular solid whose l=7, w=6, & h=2?

### geometry

I need to know surface area!!!ofall the shape!!!!!and whats lateral area ?

### geometry

Find the area of a square given that the length of each of its sides is 1/4 the value of its area.

### math

Is the exact area of a circle with an 16 m radius 32 m squared? And what would be the approximate area be?

### Math

Find the circle area with the radius being 10 in would the area A= 314 in?

### calculus

Find area of the region under the curve y = 5 x^3 - 9 and above the x-axis, for 3¡Ü x ¡Ü 6. area = ??

### math

What is the surface area of a cylinder with a top area of 35pi and a height of 20cm

### math

What is the surface area of a cylinder with a top area of 36pi and a height of 20cm

### calculus area between three curves

find the area of the region for 2y=4sqrt(x) , y=3, and 2y+3x=7

### math

Triangles C and D are congruent. If the area of the rectangle is 20 square units, what is the area of the triangle C?

### Algebra

What is the length of the side of a square that has area smaller than the area of a circle with radius r cm.

### maths

if 2cm on a map represent 5km,what area is represented by an area of 9sq cm?

### math

what is the area of the largest circle that will fit in a square with area 64 cm squared

### Math

If the area of triangle wxy is 22 square inches what is the area of wxyz

### Area in Polar Coordinates

Find the area it encloses. r = 5cos(θ)

### history

how does the geography of an area affect the type of work that the people in that area do ?

### Geometry

Find the radius of a cone if the total area = 12 pi and lateral area = 8 pi.

### Geometry

Find the radius of a cone if the total area = 12 pi and lateral area = 8 pi.

### area fraction

a nerds box is 3x/10 width and 3 1/2 cm in length. simplify the area

### Geometry

Find the surface area. sphere: area of great circle = 29.8m^2

### science

Find flux density if area is 1mWb and area 1inch^2

### Calculus 2

Find the area bounded by the curves y=4x^2-25, y=0, x=-1, x=3.5. Ps the area is not 54 or 60 I already tried.

### Calculus-Area between curves

Sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region. 2y=4*sqrt(x) , y=5 and 2y+4x=8 please help! i've been trying this problem the last couple days, even asked a TA for help, but i can't arrive at...

### Math URGENT!!

A rectangular garden has an area if 12a^2-5a-2m^2 A.) Write the area as the product of two binomials with integer coefficients B.) the garden is to be completely enclosed by a path 1 m wide. find and simplify an expression for the area of the path C.) the path is concrete, ...

### Calculus 1

A family wants to fence a rectangular play area alongside the wall of their house. The wall of their house bounds one side of the play area. If they want the play area to be exactly 1600ft^2, what is the least amount of fencing needed to make this? Round your answer to the ...

### calc: relative error

The circumference of a sphere was measured to be 77 cm with a possible error of .8 cm. Use differentials to estimate the maximum error in the calculated surface area. Estimate the relative error in the calculated surface area. please help me..thank you! Area= 4 PI radius^2 dA...

### math

what is the area of the largest circle that will fit in a square with area 64 cm squared please help me its confusing

### math

he area of a triangle with base b and height h is given by A=1/2 bh. find the area when b =15 (meter) and h= 40m

### pre-cal

Find the area of a square whose side length is 1/4 the value of its area

### math

which has the greater area: a square with a side that measures 7 meters, or a 6-by-8 meter rectangle? what is the area?

### Geometry-area

When a teacher ask you to find the area of a circle in terms of "pi" what does she mean? Ex: diameter= 16 ft. would it be 16 'pi'??

### Geometry

What is the surface area and lateral area of a regular triangular pyramid if the slant is 7 and the altitude is 5?

### Math

the area of ABCDE is 18 sq. cm.; the area of a similar pentagon PQRST is 32 sq.cm. the diagonal AC is 6 cm.; find the length of PR.

### Math, area

How would you find the area of a shape shaped like a candy cane?

### Math

The figure is a parallelogram. If the area of triangle BCD is 15 square kilometers, What is the area of ABCD?

### math/area

use the limit process to find the area of the region between f(x) = x^2 + 2 a interval [0, 3]

### Calculus

Find the area of the region bounded by f(x)=5xsqrt(121−x2) and the x-axis. The area is = to

### solid mensuration

if triangle ABC is equilateral,BD\BC=1\3 and AF\AB=1\3.what is the ratio of the area of triangleABC to the shaded area?

### math

An island has an area of 50 square kilometre.what would be its area on a map of scale 1:20000?

### Geometry

In the figure to the right, ABCD is rectangle. Find the area of △ABC, if the area of △AOD is 10.

### Math

In the figure to the right, ABCD is rectangle. Find the area of △ABC, if the area of △AOD is 10.

### Math

In the figure to the right, ABCD is rectangle. Find the area of △ABC, if the area of △AOD is 10.

### Calculus Area between curves

Consider the area between the graphs x+6y=8 and x+8=y2. This area can be computed in two different ways using integrals First of all it can be computed as a sum of two integrals where a= , b=, c= and f(x)= g(x)= I found a, but not b or c. I can't seem to figure out f(x) and g(...

### Math

Jennifer plans to fence a rectangular area around her rectangular swimming pool. The total area enclosed by the fence, including the pool, should be 5 times the area of the pool alone. The pool is 20 feet by 17 feet. What is the total area enclosed by the fence?

### Calculus

The question is find the area of the reagion that is bounded by the curve y=arctan x, x=0, x=1, and the x-axis. So I've drawn the enclosed region. To find the area would I use the Disc/shell method? If so the formula that I came up with looks like this: If area = pi(r)^2 then ...

### Math probability question

a spinner is divided into three areas x,y,z. the measure of angle a is 90 degrees, angle b is 120 degrees and angle c is 150 degrees. If the spinner is spun once, find the probabliity that it will land in 1) area X 2) area y 3) area z

### math

Find the lateral and surface area of the right rectangluar prism whose length is 7 cm, width is 5 cm and height is 1.5 cm. I did 2(7 x 1.5+ 1.5 x 5) and I got 36 as my lateral area. Then I add 36+ 2(7 x5) and I got 106 as my surface area. Is this right?

### Algebra

Top of the rectangle is 2x+5 right hand side is 5. Write an expression for the area of the rectangle. Then find the area of the rectangle in square feet if x=3. Then I need to find the value of x if the area of the rectangle is 1y0 square ft. Help!!

### maths

the length of rectangle is x cm .the width of the rectangle is 4cm less than the length. A. write an expression in terms of x for the width of the rectangle B. write the expression for the perimeter of the rectangle in terms of x C. the perimeter of the rectangle is 20 cm....

### Math

Find the area of a circle with a radius of 8 cm. Use 3.14 for pi. Type your answer as a number only. Find the area of a triangle with a base of 6 cm and a height of 3 cm. Remember your formula. Question 4 Find the area of a figure with base #1 of 4 in., base #2 of 6 in. and a ...

### Math

If the width of a window is (x+7) inches and the length is (x+9) inches, then give the expression which represents the area of the window use the formula area=base.Height. if ×=8 inches, find the area of the window using the expression you found in part a

### Math

Matchstick Rings each pattern of square rings has been made with matchsticks which are all the same length. If the length of one side of a square ring is "m" matchsticks, try to find a formula, in terms of m, for each of the following: a) The outer perimeter, P. b) The inner ...

### 5th grade

For each right triangle, draw the rectangle made by drawing sides opposite the two shorter sides in the triangle. Find the area of each rectangle. 9cm height 4cm width How does the area of each rectangle relate to the area of either triangle inside it?

### mathematics

find the area of the region between the curve y = 3-x^2 and the line y = -1 by integrating with respect to y you first have to solve for x x=(3-y)^(1/2) then area ⌠ (3-y)^(1/2 dy from -1 to 3 ⌡ =-2/3 (3-y)^(3/2 | from -1 to 3 = -2/3(0 - 8) = 16/3 but this is only ...

### Algebra

Area of a square. Find a polynomial A(x) that represents the area of the shaded region in the accompanying figure.

### math

under which transformation is the area of a triangle not equal to the area of its image? i think the answer is dilation

### math

how would i find the area of the parallelogram if the area of each right triangle region is 7 1/2 square inches

### Calculus

Find the area bounded by y= -0.5x+6, y= !/4 x and the y-axis. Sketch a graph of the two functions and shade in the area.

### Jr. Math

FIND THE AREA OF A GARDEN THAT MEASURES 31/4 BY 4/5 YARDS. AREA=LXW. i GOT 23/5 AM I CORRECT. THANKS IN ADVANCE

### maths

AD is a median and P is the midpoint of AD of triangle ABC. BP and CP are joined show area (BPC)=area(ABD)

### Algebra

The base of a triangle in terms of x is: 2^2+4x+2 and the height is x^2+3x-4 Area=1/2(2x^2+4x+2) (x^2+3x-4)= 6x^2+2 (x^2+3x-4) Trying to find the area and not sure which direction to go

### Math

Find area of the region under the curve y=9−2x2 and above the x-axis. area=?

### maths

ABCD is a parallelogram and E is the midpoint of the side CD . Prove that area (ABED )=3×area of (triangle BEC )

### Maths of class 9

P and q are points on side CD of a parallelogram ABCD. Show that area of trianglePAB =area of triangleRAB

### math

A square pyramid has a surface area of 202 ft2 and a base area of 53 ft2. What is the lateral area of the pyramid? A.149 ft2 B.96 ft2 C.174 ft2 D.151 ft2

### calculus

fine the area bounded by the graphs of y=5x^2, y=20 5 x^2 = 20 ---> x =+/-2 Area is F(2) - F(-2) where F(x) = 20x - 5/3 x^3

### math

how do you do area models and probability.and area of complex figures!

### Math

what is the area of a regular hexagon inscribed in a circle with area of 9?

### math

what is the area of a regular hexagon inscribed in a circle with area of 9?

### calculus

find the area of triangle such that area is maximum

### math

If the area of triangle A B C D is 25 square inches, what is the area of the parallelogram A B C D?

### Algerba I

a trapezuim has no sides parallel. Its area is given by the following expression 1/2(ah1 + bh2) Note: the 1 and 2 are small and almost under but beside the h A. Evaluate the expression for a = 5 ft 4 in., b = 2 ft 8 in., h1 = 4 ft 4 in., h2 = 6ft 4 in B. If a gymnast stands ...

### math

Work the following area application problem. You are given the job of laying carpet for a six-story building. At each floor the dimensions of the floor are 75 meters in length by 40 meters in width. A stairwell takes up a space 2.5 m by 1.5 m, and cuts through each floor. If ...

### Math grade 6

Mr. Lincoln is building a rectengular play area in the local park. The length of the play area is ninety-seven and one-half feet. The width of the play area is fifty-six feet. To keep xhildren from falling on a hard surface, the play area will be covered with recycled tire ...

### Math grade 6

Mr. Lincoln is building a rectengular play area in the local park. The length of the play area is ninety-seven and one-half feet. The width of the play area is fifty-six feet. To keep xhildren from falling on a hard surface, the play area will be covered with recycled tire ...

### algebra

twice the length L of a rectangle is equal to 3 times its width W. Its perimeter is 120 cm. translate the English into math.. "twice the length L of a rectangle is equal to 3 times its width W" 2L = 3W "Its perimeter is 120 cm." 2L + 2W = 120 but 2L=3W so 3W + 2W = 120 etc.

### Algebra

I just need to know how to set this problem up. You are given 28 feet of fencing and need to enclose a patio on all four sides. The following variables are defined: Let X represent the width (in feet) and Y represent the length (in feet)of the enclosed patio. Let P represent ...

### MATH

I just need to know how to set this problem up. You are given 28 feet of fencing and need to enclose a patio on all four sides. The following variables are defined: Let X represent the width (in feet) and Y represent the length (in feet)of the enclosed patio. Let P represent ...

### math

The figure below is not drawn to scale. The ratio of the triangle ABC to the area of triangle DEC to the area of the triangle FGH is 7:5:3. If 20% of the area of triangle DEC is shaded, what percentage of the figure is unshaded?