These are the answers for the first 2 questions
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<em>1.</em> 16.956 m
<em><u> formula:</u></em> C = 2πr
C = 2(3.14)(2.7)
C = 6.28(2.7)
C = 16.956
<em>4.</em> 15.7 ft.²
<u><em>formula:</em></u> C = πd
C = 3.14(5)
C = 15.7
The answer is cube root 8
<span>Discriminant is 28 (c)
First get the equation into the form: Ax^2 + Bx + C = 0 (the quadratic equation)..
By subtracting 10x both sides (to get it on the other side)..
9x^2 + 2 = 10x
9x^2 - 10x + 2 = 10x - 10x
9x^2 - 10x + 2 = 0
Now the discriminant is: b^2 - 4ac
The quadratic equation is Ax^2 + Bx + C = 0
Here, A = 9, B = -10 and C = 2
(-10)^2 - 4 (9)(2)
= 100 - 4 (18)
= 100 - 72
= 28</span>
