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3 years ago

I=E/R + r solve for r

1 answer:

4 0

For like lower case r?

then,

I = E/R + r

multiple by R to the other side and subtract E

r= I * R - E

hope that helps

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Pls help, will mark brainliest

SashulF [63]

Step-by-step explanation:

$\frac{\pi}{2} = 90$

its 1/4 of the circle

circle circumference:

$8 \times \pi$

we need 1/4 of it, so its

$2 \times \pi = 6.28$

5 0

3 years ago

A company sells widgets. The amount of profit, y, made by the company, is related to the selling price of each widget, x, by the

7nadin3 [17]

Answer:

Widgets should be sold by $38.88 to maximize the profit.

Step-by-step explanation:

Vertex of a quadratic function:

Suppose we have a quadratic function in the following format:

$f(x) = ax^{2} + bx + c$

It's vertex is the point $(x_{v}, y_{v})$

In which

$x_{v} = -\frac{b}{2a}$

$y_{v} = -\frac{\Delta}{4a}$

Where

$\Delta = b^2-4ac$

If a<0, the vertex is a maximum point, that is, the maximum value happens at $x_{v}$ , and it's value is $y_{v}$ .

In this question:

The profit is given by:

$y = -9x^2 + 700x - 6005$

Which is a quadratic function with $a = -9, b = 700, c = -6005$

The maximum profit happens at the x of the vertex. Thus

$x_{v} = -\frac{b}{2a} = -\frac{700}{2(-9)} = 38.88$

Widgets should be sold by $38.88 to maximize the profit.

7 0

3 years ago

Given 4,7,10,13. Calculate the 20th term.

Pavlova-9 [17]

Answer:

Step-by-step explanation:

to calculate the 20th term you use the formula

Tn=a+(n-1)d where a stands for the first term,n the number of terms and d the common difference.in this case the first term is 4 the common difference is 3 cause they were adding 3 to go to the next term.. therefore the solution will be:

Tn=4+(20-1)3

=4+19×3

=4+57

=61

the 20th term is 61

I hope this helps

7 0

3 years ago

Find the measure of the angle labeled x (ADB) in the circle below. A B

My name is Ann [436]

The answer is the last option!
17’

8 0

3 years ago

Need help with this. Hope someone can help

Triss [41]

Hi,

Let me help you with this problem.

$v = ( \frac{2 \times 1.5}{2} ) \times 3 \\ v = \frac{3}{2} \times 3 \\ v = 1.5 \times 3 \\ v = 4.5$

Answer: 4.5m3

Hope this helps.
r3t40

7 0

4 years ago