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4 years ago

Can an electric field exist at a point where the electrical potential there is zero

Mathematics

1 answer:

Anika [276]4 years ago

6 0

Yes ............................

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HELP ME PLS explain why

Anika [276]

Answer: 110 square cm

=======================================================

Explanation:

All sides of a regular polygon are the same length. So the bottom side is also 8 cm.

Draw lines from the center to each vertex of the pentagon. Five triangles form. Each triangle has a base of 8 and a height of 5.5 (since all five triangles are congruent)

area of one triangle = 0.5*base*height = 0.5*8*5.5 = 22

area of five triangles = 5*(area of one triangle) = 5*22 = 110

3 0

3 years ago

Determine whether quantities vary directly or inversely and find the constant of variation. 16 factory workers made 40 pieces in

Andrei [34K]

Answer:

Part A) $8\ workers$

Part B) $10\ workers$

Part C) $40\ workers$

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

Let

x -----> the number of workers

y ----> the number of pieces made

In this problem

The relation between the variables x and y represent a direct variation (proportional variation)

For x=16, y=40

Find the value of the constant of proportionality k

$k=\frac{y}{x}$

substitute the values

$k=\frac{y}{x}$

$k=\frac{40}{16}\\k=2.5\ \frac{pieces}{worker}$

The linear equation is equal to

$y=2.5x$

Part A) How many workers are needed to make 20 pieces

For y=20 pieces

substitute in the linear equation

$20=2.5x$

$x=8\ workers$

Part B) How many workers are needed to make 25 pieces

For y=25 pieces

substitute in the linear equation

$25=2.5x$

$x=10\ workers$

Part C) How many workers are needed to make 100 pieces

For y=100 pieces

substitute in the linear equation

$100=2.5x$

$x=40\ workers$

3 0

3 years ago

Please help me with this for brainliest and a cookie

RoseWind [281]

Answer:

Step-by-step explanation:

i will eat a dsmart cookie

7 0

3 years ago

Find the area of this figure 15ft 10ft 10ft 5

miskamm [114]

Answer:

150 feet2 50 feet I hope this helps!

Step-by-step explanation:

7 0

3 years ago

A pattern calls for 21 yards of material and 1 1/4 yards of lining. how much total fabric is needed

lesantik [10]

Add
21 + 1 1/4 = 22 1/4

7 0

4 years ago