A14-foot tree casts an 18-foot shadow. find the angle of elevation from the tip of the shadow to the top of the tree. round the answer to the nearest tenth. a. 37.9° b. 38.9° c. 51.1° d. 52.1°

Option A

Step-by-step explanation:

we know that

In the right triangle ABC

see the attached figure to better understand the problem    

Let

------> the angle of elevation from the tip of the shadow to the top of the tree

1. to solve this problem, you must apply the formula for calculate the surface area of a cylinder, which is:     a=2πr²+2πrh    a is the surface area of the cylinder.  r is the radius of the cylinder.  h is the height of the cylinder.    2. let's call the smaller ganza "a" and the other one "b".    3. the surface area of the ganza "a" (aa) is:     aa=2πr²+2πrh    r=diameter/2  r=3.5 cm/2  r=1.75 cm    h=10 cm    4. when you substitute these values into the formula, you obtain:     aa=2πr²+2πrh  aa=2π(1.75 cm)²+2π(1.75 cm)(10 cm)  aa=41.125π cm²    aa=129.0 cm²      5. the surface area of "b (aa) is:     ab=2πr²+2πrh    r=5.5 cm/2  r=2.75 cm    h=24.5 cm    6. when you substitute these values into the formula, you obtain:     ab=2πr²+2πrh  ab=2π(2.75 cm)²+2π(2.75 cm)(24.5 cm)  ab=149.875π cm²  ab=471.0 cm²