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Strike441 [17]
3 years ago
7

I need some help, can't figure out this last question.

Mathematics
1 answer:
Damm [24]3 years ago
5 0
He now has 36 percent
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Write a function describing the relationship of the given variables.
zhuklara [117]

Answer:

The function is A = 10√r

Step-by-step explanation:

* Lets explain the meaning of direct variation

- The direct variation is a mathematical relationship between two

  variables that can be expressed by an equation in which one

  variable is equal to a constant times the other

- If Y is in direct variation with x (y ∝ x), then y = kx, where k is the

 constant of variation

* Now lets solve the problem

# A is varies directly with the square root of r

- Change the statement above to a mathematical relation

∴ A ∝ √r

- Chang the relation to a function by using a constant k

∴ A = k√r

- To find the value of the constant of variation k substitute A and r

 by the given values

∵ r = 16 when A = 40

∵ A = k√r

∴ 40 = k√16 ⇒ simplify the square root

∴ 40 = 4k ⇒ divide both sides by 4 to find the value of k

∴ 10 = k

- The value of the constant of variation is 10

∴ The function describing the relationship of A and r is A = 10√r

8 0
3 years ago
Read 2 more answers
Need an answer to both please
ANTONII [103]

Plz mark me the braniliest

Answer:

1st answer: 52 serves

2nd answer: $8.40

Step-by-step explanation:

1st: 80 times 65 equals 5,200 divided by 100 equals 52

2nd: 42 times 0.20 equals 8.4 or 8.40

6 0
3 years ago
Which best describes the area of a polygon?
umka2103 [35]

Answer:

D.

Step-by-step explanation:

It is the number of square units  contained in the interior.

Area is 2 dimensional.

6 0
3 years ago
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Y=-3(x – 4)(x – 4) in standard form
dexar [7]

Answer:

It’s already in standard form

Step-by-step explanation:

3 0
3 years ago
What is the diameter of a circle of area 3850 m square​
Darya [45]

Answer:

70.01

steps by-step explanation:

4 0
3 years ago
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