The first method you are to use is to use shadows of objects to create two similar triangles. Find a large object whose shadow you can safely measure. Then Create a shadow with a smaller object that you can also measure. Use the measurements you have taken to calculate the height of the large object.

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet

four boxes of pizza

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0.4 liters = 400 milliliters (multiply the volume value by 1000 and it give you the answer). hope this ! ^-^