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aleksklad [387]
2 years ago
5

The intensity of light produced by a light source varies

Mathematics
1 answer:
Harrizon [31]2 years ago
3 0

Answer:

45 foot-candles.

Explanation:

I ∝ 1d2⇒I=kd2

where k is a proportionality constant.

We can solve this problem in two ways, either solving for k and subbing back in or by using ratios to eliminate k. In many common inverse square dependences k can be quite a lot of constants and ratios often save on calculation time. We will use both here though.

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If f(x) = |x| and g(x) = |x| − 4, which translation is applied to f(x) to get g(x)? A. a vertical translation of f(x) four units
Sav [38]

Hey there! :)

Answer:

D. A vertical translation of f(x) four units downward.

Step-by-step explanation:

Recall that the transformations form of an absolute value function is:

f(x) = ±a|b(x-h)|+k

Where 'a' is a vertical stretch/compression

'b' is a horizontal stretch/compression

'h' is a horizontal shift

'k' is a vertical shift

In g(x) = |x| -4, we can derive a k value of -4.

This means that from f(x) to g(x), there has been a vertical translation of f(x) four units downward.

3 0
3 years ago
The value of 10^4 is 10,000. Use this fact to change 5.2 x 10^4 to standard notation. 5.2 x 10^4 = 5.2 x ____ =?​
ICE Princess25 [194]

Step-by-step explanation:

5.2 × 10000

yep that is the answer

4 0
3 years ago
Read 2 more answers
Suppose a plane has 500 seats. From experience, it's known that 10% of people who have bought the ticket do not show up. Now, 55
oksano4ka [1.4K]

Answer:

The probability that there will be enough seats for all people who turn up is 0.78

Step-by-step explanation:

Given:

A = 500

B = 550

Since it is known from experience that 10% of people who bought tickets don't show up, to find the probability that there will be enough seats for those who show up, we have:

Percentage that will turn up = 100℅ - 10℅ = 90℅

Since 90℅ will turn up, that means the number of passengers will be less than 500.

Therefore for P less than or equal to 500, we use:

P ( X <_ 500) =

= [500 + 0.5 - (550 * 0.9)] / sqrt*(550 * 0. 9 * 0.1)

= 0.78

Therefore, the probability that there will be enough seats for all people who turn up is 0.78

7 0
3 years ago
Read 2 more answers
4. (07.06)
timofeeve [1]

The expression that represents the area of the rectangle is 2x² + 6x − 20. Thus, the correct option is C.

<h3>What is a rectangle?</h3>

A parallelogram in which adjacent sides are perpendicular to each other is called a rectangle. A rectangle is always a parallelogram and a quadrilateral but reverse statement may or may not be true.

The area of the rectangle is the product of its length and its width. Therefore, the area of the given rectangle is,

Area = (2x-4)(x+5)

       = 2x² + 10x - 4x - 20

       = 2x² +6x - 20

Hence, the expression that represents the area of the rectangle is 2x² + 6x − 20. Thus, the correct option is C.

The complete question is:

Write a simplified polynomial expression in standard form to represent the area of the rectangle below.

  • 2x² + 10x + 20
  • 2x² + 6x + 20
  • 2x² + 6x − 20
  • 2x² − 4x − 20

The image of the rectangle is given below.

Learn more about Rectangle:

brainly.com/question/15019502

#SPJ1

3 0
2 years ago
What is the second step to solving 49n+986=-43 and why?
Nana76 [90]

I will let you decide what counts as a second step,<em> </em>I'm going to write out all the steps.

starting from original equation

49n+986=-43

49n=-1029

n=-21

:D

4 0
3 years ago
Read 2 more answers
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