2x²-6x+8=0
x²-3x+4=0
D=b²-4ac=9-16=-7
x=(3+/-i√7)/2
correct answer is the last one
The value of nickels is $76.80.
The height of each nickel is 6.25 / 100 = 0.0625 inches.
Divide 8 feet by 0.0625 inches to find that there are
8×12 / 0.0625 = 1536 nickels in an 8 ft stack.
Their value is $76.80.
Nickel is a chemical detail with the symbol Ni and atomic range 28. It is silvery-white lustrous steel with a mild golden tinge. Nickel belongs to the transition metals and is hard and ductile.
Pure nickel, powdered to maximize the reactive surface vicinity, indicates a widespread chemical interest, but large pieces are slow to react with air underneath fashionable conditions because an oxide layer paperwork at the floor stops further corrosion (passivation).
Learn more about Nickel here: brainly.com/question/9181464
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Answer:
A. The area is
B. She needs to cover 1661.9 square feet of tiles for the base of the swimming pool
Step-by-step explanation:
Question A:
Let us assume that the leash is pegged to the ground using a stake. as a result, the dog can move around the stake. The path that the motion of the dog would trace is a circle, and the radius of the circle will be the length of the leash.
Since we know this, we can easily find the area of the circle using
Area of the circle =
Question B
Dulce wants to cover the whole surface area of the floor of the circular swimming pool with tiles.
We already know that the swimming pool is circular, hence, the surface area of the base of the swimming pool will be the same as the area of a circle, with the same radius.
The area of the circle can be calculated using
Area of circle =
PEMDAS
parenthases first
1/4+5/4=6/4=3/2
we now havve
3/2 times 2+ 3/4
multilication
3/2 times 2=6/2=3
now we have
3+3/4=12/4+3/4=15/4
15/4 or 3 and 3/4