Answer:
5275.2 m³
Step-by-step explanation:
We need the radius first:
= 12
Formula for volume = πr²*h/3
Volume = 3.14 * 144 * 35/3
Volume = 5275.2
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12x42=504
504 cents earned every day when 42 papers are delivered
For a week= 504x7
3528cents
40 ÷ 2.40= 16.66
the teacher can buy 16 cookies
Answer:
Soft drink: $1.40
Hot dog: $1.75
Step-by-step explanation:
variables:
soft drink- d
hot dog- h
set up equation:
3d+2h=7.70
2d+1h=4.55
solve:
You can either use the Pythagorean theorem right away (a = -3, b = 27, c = 1200) or Try factoring the polynomial to find the zeros.
I would factor and start by dividing everything by -3.
<span>-3x^4 + 27x^2 + 1200 = 0
-3(x^4 - 9x^2 - 400) = 0
If you divide by -3 on both sides you see that the -3 is now gone. 0/-3 = 0
x^4 - 9x^2 - 400 = 0
factor further or use Pythagorean theorem.
(x² - 25)(x² + 16) = 0
Solve for the x-values by setting each one equal to zero.
x² - 25 = 0
x² = 25
x is +5 or -5
x² + 16 = 0
x² = -16
x = √(-16)
Two non-real solutions
x is +4i or -4i
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