Decrease = 500000 - 420000 = 80000
Percent decrease = 80000 / 500000 x 100% = 16%
Use of word “amount” is irritating as in English this only used for measurements.
“Number” of cars would be better grammar.
I would say the third one would be the correct or the second one
Answer:
21
Step-by-step explanation:
Since this is a right triangle, we can use the Pythagorean theorem
a^2 +b^2 = c^2
where a and b are the legs and c is the hypotenuse (opposite the right angle)
20^2 +b^2 = 29^2
400 + b^2 =841
Subtract 400 from each side
400-400 +b^2 = 841-400
b^2 = 441
Take the square root of each side
sqrt(b^2) = sqrt(441)
b = 21
