60 = 2x - 16
2x= 16+ 60 = 76
76 / 2 = 38
Hope this helps!
Best of luck
Answer:
Step-by-step explanation:
Given that:
The focal point = 18 inches
= (18 × 0.0254)m
= 0.4572 m
= 45.7 cm
For such a comfortable distance of 45.7 cm, the perfect lens power for grandfather can be determined.
Let's recall that, the accommodation amplitude usually decreases with age and eventually becomes 1 D after the age of 50.
Thus, +2.5D or a convex lens appears to be a perfect one.
b. We will agree that Diopter illustrates the optical power or most at times the capability of the lens.
So, 3D is equally 1.75X magnification which is likely to be double the zoom as it will be helpful to the grandfather.
Now, for a 2.5D, approximately 1.5X zooming once(200%) will be perfect and equal to viewing with the reading glasses.
-3/10= -0.3
They are both the same amount. 3 tenths and 3 tenths!
Example:
2/100= 0.02 so 2/100 and 0.02 are equal! It is all about the denominator and where the decimal point will go: 10= 0.1 100= 0.01 and 1000= 0.001
Given that each of the brick is
ft tall and the finished stack of bricks is
ft tall.
Let the number of bricks in the stack be x, then
Therefore, 7 bricks will go in the stack.
