3.5×22/7+12answer step by step
Step 1: Multiply 3.5 by 22:
3.5 x 22 = 77
Step 2: Divide 77 by 7:
77 / 7 = 11
Step 3: Add 11 to 12:
11 + 12 = 23
Therefore, the answer is 23.
The area of a circle is 38.5cm.find it's diameter
We know that the area of a circle is given by the formula:
A = πr^2
where A is the area and r is the radius of the circle.
We are given that the area of the circle is 38.5 cm, so we can use this information to find the radius:
38.5 = πr^2
Dividing both sides by π:
r^2 = 38.5 / π
Taking the square root of both sides:
r = √(38.5 / π)
Now that we know the radius, we can use the formula for the diameter of a circle:
d = 2r
Substituting the value of r:
d = 2 x √(38.5 / π)
Using a calculator, we can approximate this value to:
d ≈ 7.01 cm
Therefore, the diameter of the circle is approximately 7.01 cm.
To solve the expression 3.5×22/7+12 step by step, follow these steps:
Step 1: Multiply 3.5 by 22
3.5 × 22 = 77
Step 2: Divide the result from step 1 by 7
77 ÷ 7 = 11
Step 3: Add the result from step 2 to 12
11 + 12 = 23
Therefore, the value of the expression 3.5×22/7+12 is 23.