3 years ago

Center: (0,-1), Circumference: 25Pie

Mathematics

1 answer:

yan [13]3 years ago

5 0

Answer:

$x^2 + (y+1)^2 = 12.5^2$

Step-by-step explanation:

since C = πd, the diameter is 25.

So, the radius is 12.5

You might be interested in

in a class of 34 students 19 of them are girls what percentage of the class are girls to 1 decimal place

motikmotik

Answer:

55.9% of the class are girls

Step-by-step explanation:

19/34 = 0.559

0.559 x 100 = 55.9%

6 0

2 years ago

Read 2 more answers

An airplane at T(80,20)needs to fly to both U(20,60) and V(110,85). what is the shortest possible distance for the trip?

olga2289 [7]

The answer is 165 units.

4 0

3 years ago

You deposit $125 in a savings account that earns 5% annual interest compounded yearly. Find the balance in the account after the

Paul [167]

125 x.5 =62.5 times 12 months equals 750

7 0

3 years ago

95% of what number is 38

vlabodo [156]

Answer:

38 would be 95 percent of 40

6 0

2 years ago

Read 2 more answers

A manager at a local company asked his employees how many times they had given blood in the last year. The results of the survey

Lubov Fominskaja [6]

Answer:

$Var(X) = E(X^2) -[E(X)]^2 = 4.97 -(1.61)^2 =2.3779$

And the deviation would be:

$Sd(X) =\sqrt{2.3779}= 1.542 \approx 1.54$

Step-by-step explanation:

For this case we have the following distribution given:

X 0 1 2 3 4 5 6

P(X) 0.3 0.25 0.2 0.12 0.07 0.04 0.02

For this case we need to find first the expected value given by:

$E(X) = \sum_{i=1}^n X_i P(X_I)$

And replacing we got:

$E(X)= 0*0.3 +1*0.25 +2*0.2 +3*0.12 +4*0.07+ 5*0.04 +6*0.02=1.61$

Now we can find the second moment given by:

$E(X^2) =\sum_{i=1}^n X^2_i P(X_i)$

And replacing we got:

$E(X^2)= 0^2*0.3 +1^2*0.25 +2^2*0.2 +3^2*0.12 +4^2*0.07+ 5^2*0.04 +6^2*0.02=4.97$

And the variance would be given by:

$Var(X) = E(X^2) -[E(X)]^2 = 4.97 -(1.61)^2 =2.3779$

And the deviation would be:

$Sd(X) =\sqrt{2.3779}= 1.542 \approx 1.54$

8 0

3 years ago