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lorasvet [3.4K]
3 years ago
10

A(r) is a function that gives the area of a circle with radius r. It can be written in equation form as A(r)=3.14r2. What is the

values of A(5)?
Mathematics
1 answer:
GREYUIT [131]3 years ago
3 0
F(r) = 3.14r^2....and ur looking for f(5)....so basically all u do is sub in 5 for r.

f(5) = 3.14 * 5^2
f(5) = 3.14 * 25
f(5) = 78.50 <===

THE ANSWER IS 78.50

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Jasmin, Quinn, and Maddy are rock climbing. Jasmin is 42 ½ feet below Quinn. Maddy is 67 ¾ feet above Jasmin. What is Maddy's po
ladessa [460]

Answer:

25\frac{1}{4} feet

<em />

Step-by-step explanation:

Given

Maddy = 67\frac{3}{4} above Jasmin

Jasmin = 42\frac{1}{2} below Quinn

Required

Determine Maddy's position relative to Quinn's

From the given parameter, one can easily deduce that Quinn is in between Maddy and Jasmin (See attachment)

Using the attachment as a point of reference;

z = 67\frac{3}{4}

x = 42\frac{1}{2}

The relationship between x, y and z is

z = y + x

Make y the subject of formula

y = z - x

Substitute the values of z and x

y = 67\frac{3}{4} - 42\frac{1}{2}

Convert to improper fractions

y = \frac{271}{4} - \frac{85}{2}

Take LCM

y = \frac{271 - 170}{4}

y = \frac{101}{4}

y = 25\frac{1}{4}

<em>Hence; Maddy's position relative to Quinn's is </em>25\frac{1}{4}<em> feet</em>

8 0
3 years ago
How do I solve this problem?
Brrunno [24]
A. x=the cost of one lunch. 60.25=5x+3(x-5.25)

b. 60.25=5x+3x-15.75                    60.25+15.75=8x-15.75+15.75

 76=8x                  76/8=8x/8              9.50=x

A lunch is $9.50. If you are not sure, check my answers. Hope this helped.
8 0
3 years ago
What is mBC ?<br> A. 28<br> B. 56<br> C. 70<br> D. 140
const2013 [10]

56 is the right answer trust me

5 0
3 years ago
Read 2 more answers
What can you tell about a triangle when given three side lengths?
Genrish500 [490]
Check whether it is possible to have a triangle with the given side lengths for example 7,9,13 then add any two sides and see if it is greater than the other side. Example the sum of 7 and 9 is 16 and 16 is greater than 13
3 0
2 years ago
Someone again plz help my lil sister
NNADVOKAT [17]

Answer:

9 + 2j is the required algebraic equation.

3 0
2 years ago
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