Suppose you live 4.4 miles from the bottom of a hill. from your home, you see a plane directly above the hill. you estimate that the plane is about 2.5 miles in the sky from the bottom of the hill. you draw a diagram of the situation. estimate the direct distance from you to the plane.

If you draw a diagram of the situation. You will see that the diagram will form a right triangle. Let us set the sides of the triangle as:
a = distance from you to the bottom of the hill = 4.4 miles
b = distance from the bottom of the hill to the plane = 2.5 miles
c = the direct distance of the plane from you = unknown

Since we have two given sides and we know that it is a right triangle, we use the Pythagorean theorem.
c^2 = a^2 + b^2
c^2 = 4.4^2 + 2.5^2
c = 5.06 miles

From the calculations, we see that the direct distance of the plane to you is 5.06 miles.

He secknd step was the answer to them

1. 0.3 •4 is the same as 4 groups of 0.32. 7•0.8 is the same as 7 groups of 0.83. it increases by 0.5 every time, so 0.5x4 it increases by 0.9 every time, so 0.9x5. 0.9•12=10.86. 0.47•5=2.35i can finish the next ones in a separate post