Please help this is the last question on my test!! What is the approximate area of a circle with a radius of 4 feet? Use 3.14

Mathematics

2 answers:

Angelina_Jolie [31]3 years ago

4 0

Answer:

50 feet²

Step-by-step explanation:

r = 4 feet

Area of circle = $\pi$ r²

= 3.14 * 4 * 4

= 50.24 = <u>50 feet²</u>

earnstyle [38]3 years ago

4 0

Answer:

50.24 square feet

Step-by-step explanation:

area = π $r^{2}$

area = 3.14 x 4ft

area = 50.24 $ft^{2}$

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expeople1 [14]

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Step-by-step explanation:

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3 years ago

WILL GIVE BRAINLIEST NEED HELP ASAP THANK YOU <3

AleksandrR [38]

Answer: C.

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Hope this helps!!! Good luck!!! :)

3 0

2 years ago

PLEASE HELP ME!!!!!!!!!

vitfil [10]

$(x - 4) {}^{2} - 28 = 8 \\ (x - 4) {}^{2} = 8 + 28 \\ (x - 4) {}^{2} = 36$

This must be true for some value of x, since we have a quantity squared yielding a positive number, and since the equation is of second degree,there must exist 2 real roots.

$\sqrt{(x - 4) {}^{2} } = ± \sqrt{36} \\x - 4 = ±6 \\ x _{1}- 4 = 6 \: \: \: \: \: \: \: \: \: \: x _{2}- 4 = - 6 \\ x_{1} = 6 + 4 \: \: \: \: \: \: \: \: \: \: x_{2} = - 6 + 4 \\ x_{1} = 10 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: x_{2} = - 2$

Well he started off correct to the point of completing the square.

$(x - 3) {}^{2} = 16 \\ x - 3 = ±4 \\ \: x_{1} - 3 = 4 \: \: \: \: \: \: \: \: \: \: \: \: x_{2} - 3 = - 4 \\ x_{1} = 7 \: \: \: \: \: \: \: \: \: \: x_{2} = - 1$