The answer to your problem your story that’s how you write it
She must have a score greater than 69 in her final tests
Let the required score be "x"
<h3>What is Mean?</h3>
The mean of the data is the ratio of the sum to the total sample
Mean = 80+76+85+85+x/5
80+76+85+85+2x/5 > 79
326+x/5 > 79
326 + x > 395
x > 395 - 326
x > 69
This shows that she must have a score greater than 69 in her final tests
Learn more on mean here: brainly.com/question/1136789
First of all, recall that 1.5m is the same as 150cm.
Now, we simply build a proportion where we consider 48 to be 100, and wonder what 150 will be:
Solving for x, we have
Which actually makes sense, because we're stating that 1.5m is about 300% of 48cm, which means three times as much. Which is true, because three times 48cm means 144cm, which is about 1.5m
I wonder what shape the window is? It has a radius so I expect a circle but you use the word perimeter which is usually reserved for shapes with sides.
So my guess is you are looking for the circumference of a circular window with radius 20. The circumference is given by (pi)d where d is the diameter. The diameter is twice the radius so 40. We use 3.14 to approximate pi.
That makes the circumference (the distance around the circle) = (40)(3.14)=125.6