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Tju [1.3M]
3 years ago
6

If the radius of a circle is increased by a factor of 3, how will the area of the object be affected?

Mathematics
1 answer:
Sunny_sXe [5.5K]3 years ago
8 0
Area of a Circle is directly proportional to the square of it's radius. So, if radius is increased by 3, area will increase by 3^2 = 9

In short, Your Answer would be: Option C

Hope this helps!
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The credit remaining on a phone card (in dollors) is a linear function of the total calling trime made with the card ( in minute
KATRIN_1 [288]

After 85 minutes of calls, there are $27.25 left on the card.

<h3>What is the remaining credit after 85 minutes of calls?</h3>

A linear equation in slope-intercept form is:

y = a*x + b

Where a is the slope.

If the line passes through two points (x₁, y₁) and (x₂, y₂) the slope is:

a = \frac{y_2 - y_1}{x_2 - x_1}

In this case, we know that the line passes through the points (22, 36.7) and (52, 32,20)

(points of the form (time, dollars)).

So the slope is:

a = \frac{32.2 - 36.7}{52 -22} = -0.15

The linear equation is then:

y = -0.15*x + b

To find the value of b, we use the point (22. 36.7)

36.7 = -0.15*22 + b

36.7 + 0.15*22 = b = 40

Then the linear equation is:

y = -0.15*x +40

The amount remaining in the credit card after 85 minutes is given by evaluating the above equation in x = 85.

y = -0.15*85 + 40 = 27.25

This means that after 85 minutes of calls, there are $27.25 left on the card.

If you want to learn more about linear equations:

brainly.com/question/1884491

#SPJ1

7 0
2 years ago
Why is - t - 3 written as 3 - t? Is it wrong if it is left as -t -3?
Eddi Din [679]

-t-3 and 3-t are not the same since t-3 would result in a negative answer since both -t and -3 are negative. While in t-3 t is positive and -3 is negative. it is wrong if its left as t-3 since -t-3=3-t is false.

4 0
3 years ago
Determine which ordered pairs are part of the solutions set for the inequality.(Hint - There may be more than 1 correct answer)"
Alisiya [41]
These ordered pairs<span> are in the </span>solution set<span> of the equation </span>x<span> > </span>y. ... (2<span>, </span>0<span>). </span>3(2<span>) + </span>2(0<span>) ≤ 6. 6 + </span>0<span> ≤ 6. 6 ≤ 6. (</span>4, −1<span>). </span>3(4<span>) + </span>2(−1) ≤ 6. 12 + (−2<span>) ≤ 6 ... </span>3<span>). </span>
6 0
3 years ago
Find the area of a circle with a diameter of 7mm .​
4vir4ik [10]

Answer: 38.48451

Step-by-step explanation:

7 0
1 year ago
How do you simplify (4 – 5) – (13 – 18 + 2) ?
denpristay [2]

Answer:

2

Step-by-step explanation:

4-5= -1

13-18+2= (-5+2)= -3

-1-(-3)=2

Don't forget your order of operations

P (parenthesis)

E (exponents)

MD (multiplication/division)

AS (addition/subtraction)

6 0
3 years ago
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