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tino4ka555 [31]
3 years ago
6

A circle has an area of 78.5 square inches. What is the diameter of the circle?

Mathematics
2 answers:
Reptile [31]3 years ago
8 0
The diameter is 10 square inches
qaws [65]3 years ago
8 0
The formula for the area of a circle is the following:

A =   \pi r^{2}

where A is the area and r is the radius of the circle. We also know that the diameter of a circle is twice the length of the radius, so you are able to determine the radius using the above formula, and then you can double it to get the diameter.
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Please help me with this problem :) <br> show ur work please
Marina CMI [18]

Answer:

\boxed{w = 14.9} \: or \: you \: can \: say \:  \underline{\boxed{w = 15} }

Step-by-step explanation:

applying \: the \: pythagorean \: rule :  \\  {(hyp)}^{2}  = {(adj)}^{2}   +  {(opp)}^{2}  :  \\  {w}^{2}  =  {11}^{2}  +  {10}^{2}  \\  {w}^{2}  = 221 \\ w =  \sqrt{221}  \\  \boxed{w = 14.866068747}

7 0
3 years ago
The mean of the temperatures in the chart is 24° with a standard deviation of 4°. which temperature is within one standard devia
babymother [125]

Given: Mean temperature μ = 24 , standard deviation σ =4

The lower and upper bound for temperature within one standard deviation of the mean is given by,

Lower bound = μ - σ = 24 - 4

Lower bound = 20

Upper bound = μ + σ = 24+ 4

Upper bound = 28

The temperature value between (20, 28) is said to be within one standard deviation of the mean.

From given option 27° lies in between (20°, 28°), hence 27° is the temperature value that is within one standard deviation of mean.

5 0
3 years ago
Read 2 more answers
A conveyor belt moves at a constant rate of 12 feet in 3 seconds. A second conveyor belt moves at a constant rate of 21 in 7 sec
White raven [17]

Answer:

No.

Step-by-step explanation:<u> If we look at the first conveyor belt, the rate is 12ft in 3 seconds, or 4 feet a second. The second conveyor belt moves at 21 feet in 7 seconds, or 3 feet a second. Since the two values are unequal, we can conclude it is not a proportional relationship. </u>

6 0
2 years ago
Bianca has 3/4 pound of tuna salad. She uses 1/3 of the tuna salad to make sandwiches. How much of the tuna salad did Nianca use
Bingel [31]

Bianca used \frac{1}{4}\ pound of tuna salad.

Step-by-step explanation:

Given,

Amount of Salad available = \frac{3}{4}\ pounds

Amount used by Bianca = \frac{1}{3}\ of\ available\ amount

Amount used by Bianca = \frac{1}{3}*\frac{3}{4}

Amount used by Bianca = \frac{1}{4}\ pound

Bianca used \frac{1}{4}\ pound of tuna salad.

Keywords: fraction, multiplication

Learn more about fractions at:

  • brainly.com/question/11408596
  • brainly.com/question/11470904

#LearnwithBrainly

4 0
2 years ago
Choose all sets contAining the number -1.576
alexandr1967 [171]
What sets are you talking about
3 0
2 years ago
Read 2 more answers
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