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3 years ago

What is the volume of a pyramid that is 11 inches tall and has a base of 4 inches

Mathematics

1 answer:

Elina [12.6K]3 years ago

6 0

The volume is 58.67

I used the the formula V= l*w*h / 3 to solve for the volune of a pyramid

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How much do the exterior angles of a 15-gon sum up to ?

Elina [12.6K]

Answer:

360 degrees

Step-by-step explanation:

Exterior angles always add up to 360 degrees

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3 years ago

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Edith leaves her home at 11:50 am.

dexar [7]

Answer:

2:30 minutes her journey finish.

distance / speed = time

75 / 30 = 2.5 hours :

it means 2:20 pm they finish her journey

Step-by-step explanation:

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3 years ago

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A farmer wants to fence a rectangular garden next to his house which forms the northern boundary. The fencingfor the southern bo

Ivahew [28]

Answer:

10 ft x 10 ft

Area = 100 ft^2

Step-by-step explanation:

Let 'S' be the length of the southern boundary fence and 'W' the length of the eastern and western sides of the fence.

The total area is given by:

$A=S*W$

The cost function is given by:

$\$ 120 = \$3*2W+\$6*S\\20 = W+S\\W = 20-S$

Replacing that relationship into the Area function and finding its derivate, we can find the value of 'S' for which the area is maximized when the derivate equals zero:

$A=S*(20-S)\\A=20S-S^2\\\frac{dA}{dS} = \frac{d(20S-S^2)}{dS}\\0= 20-2S\\S=10$

If S=10 then W =20 -10 = 10

Therefore, the largest area enclosed by the fence is:

$A=S*W\\A=10*10 = 100\ ft^2$

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3 years ago

. A tree casts a shadow that is 10 metres long. If the angle of elevation to the top of the tree from the ground at the end of t

Ghella [55]

Answer:

Tree = 17.32 m

Step-by-step explanation:

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3 years ago

Simplify the equations: -3(-2h+-3)

Alex17521 [72]

Answer:6h+9

Step-by-step explanation:

-3(-2h-3)

Open the brackets

6h+9

7 0

3 years ago