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Doss [256]
3 years ago
8

A circular swimming pool has a radius of 20 feet. A fence is going to be built so that there is a 4-foot space around the entire

pool. What is the length of the fence? Sunitha solved the problem as shown.
A circle with radius of 20 feet. A larger circle is 4 feet larger than the smaller circle. Radius = 24 feet. Circumference = 24 pi.

What was her error?
A) She should have used 12 in the formula, not 24.
B) She forgot to multiply the radius by 2 in the formula.
C) She did not add the additional fence length to the pool’s radius.
D) She should have used 4 ft in the formula.
Mathematics
2 answers:
Law Incorporation [45]3 years ago
6 0

Answer: she forgot to multiply the radius by 2 in the formula .

Step-by-step explanation:

Marrrta [24]3 years ago
6 0

Answer:

B

Step-by-step explanation:

i got it correct on edge :)

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In 10 minutes a heart rate can be 700 times at this rate how many to minutes will a heartbeat 140 times at what rate can a heart
VashaNatasha [74]
700/10=70
140/70=2
A heart beats 70 beats a minute
It takes 2 min to beat 140 times
8 0
2 years ago
PLEASE HELP ASAP GEOMETRY 20 PTS REAL ANSWERS ONLY
kodGreya [7K]

Answer:

Step-by-step explanation:

Use the Law of Cosines to find the measure of angle A from the lengths of the sides.

A = arccos[(b²+c²-a²)/(2bc)] ≅ 29.9°

B = arccos[(a²+c²-b²)/(2ac)] ≅ 54.8°

C = 180 - A - B = 95.3°

7 0
2 years ago
On the number line below the Numbers eight and B are the same distance from zero what is a plus B explain how you know?
Igoryamba
A = 1
b = -1

a + b = 
1 + (-1) =
1 - 1 =
0....so a + b = 0

additive inverse property states that every real number added to its additive inverse (or opposite) will equal zero.


3 0
3 years ago
Solve for y.<br> y y<br> —— = ——<br> P-9 P+9
Veronika [31]

9514 1404 393

Answer:

  y = 0

Step-by-step explanation:

Subtracting the right side gives ...

  \dfrac{y}{P-9}-\dfrac{y}{P+9}=0\\\\y\left(\dfrac{(P+9)-(P-9)}{P^2-81}\right)=0\\\\y\left(\dfrac{18}{P^2-81}\right)=0\\\\\boxed{y=0}

The factor multiplying y cannot be zero, so y must be zero.

5 0
3 years ago
A shade of green paint is made by mixing blue paint and yellow paint in the ratio of 4 to 3. How many pints of blue paint and ye
nexus9112 [7]

Answer:

Blue = 12

Yellow = 9

Step-by-step explanation:

Given

Blue : Yellow = 4 : 3

Required

Determine the number of pints of each to make 21 of green paints

First, calculate the total ratio.

Total = 4 + 3

Total = 7

The blue and the yellow pint can be represented individually as:

Blue = \frac{4}{7} * Green

Yellow = \frac{3}{7} * Green

Number of blue paint calculated last week is:

Blue = \frac{4}{7} * 21

Blue = {4} * 3

Blue = 12

Yellow = \frac{3}{7} * Green

Yellow = \frac{3}{7} * 21

Yellow = {3} * 3

Yellow = 9

8 0
3 years ago
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