Answer:
you are 78
Step-by-step explanation:
a = age
500 -4a = 188
subtract 500 from each side
500-4a -500=188-500
-4a = -312
divide by -4
-4a/-4 = -312/-4
a =78
Answer:
1.97
Step-by-step explanation:
The null hypothesis is:
The alternate hypotesis is:
Our test statistic is:
In which X is the sample mean, 
is the hypothesis tested(null hypothesis), 
is the standard deviation and n is the size of the sample.
In this problem, we have that:
So
Answer:
0.34
Step-by-step explanation:
I just used a calculator
If the diameter of the smaller circle is 3.5cm, that means the radius is 1.75cm.
The area of the smaller circle is π × 1.75², which is ≈ 9.62112750162.
The diameter of the larger circle is 12.5 cm, so the radius would be half that, which is 6.25cm. The area of the larger circle would be π × 6.25², which is ≈ 122.718463031.
So now that we know the area of the larger circle and the smaller circle, we can find the area of the shaded region by subtracting the area of the smaller circle from the area of the larger circle, which is basically just 122.718463031 - 9.62112750162, which is = 113.097336. The closest answer here is 113.04, hence the answer is 113.04cm².
