Formulas:
Area_semicircle = Πr2/2
Area_rectangle = lw
Given:
Semicircle is engraved in the rectangle
length_rectangle = 8
Assumption:
Diameter of semicircle is equivalent to length of rectangle
diameter_semicircle = length_rectangle
diameter_semicircle = 8
Based on assumption, radius_semicircle is equal to the width of the rectangle.
diameter_semicircle/2 = radius_semicircle
radius_semicircle = 4 = width of rectangle
Solve:
Area_rectangle = l*w = 4*8 = 32
Area_semicircle = Πr2/2 = Π(4)2/2 = 8Π = 25.12
<span>
Area_rectangle - Area_semicircle = 32 - 25.12 = 6.88</span>
25x+ the diameter of a rectangle
To convert a decimal into scientific notation, move the decimal point until you get to the left of the first non-zero integer. The number of places the decimal point moves is the power of the exponent, because each movement represents a "power of 10".
Answer:
Correct answer: 25 gallons and 4.6%
Step-by-step explanation:
We will solve this problem using the following equation:
15 · 3 + 10 · 7 = 25 · x ⇒ 45 + 70 = 25 x ⇒ 25 x = 115
x = 115 / 25 = 4.6 %
if you mix 15 gallons with 10 gallons you get a total of 25 gallons of mixture.
God is with you!!!
12.5 - is 25% of
Solution: 50